Update the documentation to let users understand how to pass paramete…

…rs of type Option`<Move Type>` via JSON (#20210)

## Description 

Update the documentation to let users understand how to pass parameters
of type Option`<Move Type>` via JSON
- sui-api.mdx
- json-rpc-format.mdx

This is very helpful when users pass parameters using JSON RPC and sui
client call.

docs/content/references/sui-api.mdx

@@ -45,5 +45,5 @@ Additionally, Move supports u128 and u256 but JSON doesn't. As a result Sui allo
 |       Address       |                                                                                                                                   32 byte hex string prefixed with 0x                                                                                                                                    |                                               "0xbc33e6e4818f9f2ef77d020b35c24be738213e64d9e58839ee7b4222029610de"                                                |                                0xbc33: string too short bc33e6e4818f9f2ef77d020b35c24be738213e64d9e58839ee7b4222029610de: missing 0x prefix 0xG2B1A39A1514E1D8A7CE45919CFEB4FEE70B4E01: invalid hex char G                                |
 |      ObjectID       |                                                                                                                                   32 byte hex string prefixed with 0x                                                                                                                                    |                                               "0x1b879f00b03357c95a908b7fb568712f5be862c5cb0a5894f62d06e9098de6dc"                                                |                                                                                                             Similar to above                                                                                                              |
 |     Identifier      | Typically used for module and function names. Encoded as one of the following: A String whose first character is a letter and the remaining characters are letters, digits or underscore. A String whose first character is an underscore, and there is at least one further letter, digit or underscore |                                               "function", "\_function", "some_name", "\_\_\_\_some_name", "Another"                                               |                         "\_": missing trailing underscore, digit or letter, "8name": cannot start with digit, ".function": cannot start with period, " ": cannot be empty space, "func name": cannot have spaces                          |
-| Vector`<Move Type>` |                                                                                  Homogeneous vector of aforementioned types including nested vectors of primitive types (only "flat" vectors of ObjectIDs are allowed)                                                                                   | [1,2,3,4]: simple U8 vector [[3,600],[],[0,7,4]]: nested U32 vector ["0x2B1A39A1514E1D8A7CE45919CFEB4FEE", "0x2B1A39A1514E1D8A7CE45919CFEB4FEF"]: ObjectID vector | [1,2,3,false]: not homogeneous JSON [1,2,null,4]: invalid elements [1,2,"7"]: although Sui allows encoding numbers as strings meaning this array can evaluate to [1,2,7], the array is still ambiguous so it fails the homogeneity check. |
+| Vector`<Move Type>` / Option`<Move Type>` |                                                                                  Homogeneous vector of aforementioned types including nested vectors of primitive types (only "flat" vectors of ObjectIDs are allowed)                                                                                   | [1,2,3,4]: simple U8 vector [[3,600],[],[0,7,4]]: nested U32 vector ["0x2B1A39A1514E1D8A7CE45919CFEB4FEE", "0x2B1A39A1514E1D8A7CE45919CFEB4FEF"]: ObjectID vector | [1,2,3,false]: not homogeneous JSON [1,2,null,4]: invalid elements [1,2,"7"]: although Sui allows encoding numbers as strings meaning this array can evaluate to [1,2,7], the array is still ambiguous so it fails the homogeneity check. |
 |    Vector`<u8>`     |                                                                                                            For convenience, Sui allows: U8 vectors represented as UTF-8 (and ASCII) strings.                                                                                                             |                                                      "√®ˆbo72 √∂†∆˚–œ∑π2ie": UTF-8 "abcdE738-2 \_=?": ASCII                                                      |                                                                                                                                                                                                                                           |

docs/content/references/sui-api/json-rpc-format.mdx

@@ -39,5 +39,5 @@ Additionally, Move supports u128 and u256 but JSON doesn't. As a result Sui allo
 |       Address       |                                                                                                                                   32 byte hex string prefixed with 0x                                                                                                                                    |                                               "0xbc33e6e4818f9f2ef77d020b35c24be738213e64d9e58839ee7b4222029610de"                                                |                                0xbc33: string too short bc33e6e4818f9f2ef77d020b35c24be738213e64d9e58839ee7b4222029610de: missing 0x prefix 0xG2B1A39A1514E1D8A7CE45919CFEB4FEE70B4E01: invalid hex char G                                |
 |      ObjectID       |                                                                                                                                   32 byte hex string prefixed with 0x                                                                                                                                    |                                               "0x1b879f00b03357c95a908b7fb568712f5be862c5cb0a5894f62d06e9098de6dc"                                                |                                                                                                             Similar to above                                                                                                              |
 |     Identifier      | Typically used for module and function names. Encoded as one of the following: A String whose first character is a letter and the remaining characters are letters, digits or underscore. A String whose first character is an underscore, and there is at least one further letter, digit or underscore |                                               "function", "\_function", "some_name", "\_\_\_\_some_name", "Another"                                               |                         "\_": missing trailing underscore, digit or letter, "8name": cannot start with digit, ".function": cannot start with period, " ": cannot be empty space, "func name": cannot have spaces                          |
-| Vector`<Move Type>` |                                                                                  Homogeneous vector of aforementioned types including nested vectors of primitive types (only "flat" vectors of ObjectIDs are allowed)                                                                                   | [1,2,3,4]: simple U8 vector [[3,600],[],[0,7,4]]: nested U32 vector ["0x2B1A39A1514E1D8A7CE45919CFEB4FEE", "0x2B1A39A1514E1D8A7CE45919CFEB4FEF"]: ObjectID vector | [1,2,3,false]: not homogeneous JSON [1,2,null,4]: invalid elements [1,2,"7"]: although Sui allows encoding numbers as strings meaning this array can evaluate to [1,2,7], the array is still ambiguous so it fails the homogeneity check. |
+| Vector`<Move Type>` / Option`<Move Type>` |                                                                                  Homogeneous vector of aforementioned types including nested vectors of primitive types (only "flat" vectors of ObjectIDs are allowed)                                                                                   | [1,2,3,4]: simple U8 vector [[3,600],[],[0,7,4]]: nested U32 vector ["0x2B1A39A1514E1D8A7CE45919CFEB4FEE", "0x2B1A39A1514E1D8A7CE45919CFEB4FEF"]: ObjectID vector | [1,2,3,false]: not homogeneous JSON [1,2,null,4]: invalid elements [1,2,"7"]: although Sui allows encoding numbers as strings meaning this array can evaluate to [1,2,7], the array is still ambiguous so it fails the homogeneity check. |
 |    Vector`<u8>`     |                                                                                                            For convenience, Sui allows: U8 vectors represented as UTF-8 (and ASCII) strings.                                                                                                             |                                                      "√®ˆbo72 √∂†∆˚–œ∑π2ie": UTF-8 "abcdE738-2 \_=?": ASCII                                                      |                                                                                                                                                                                                                                           |