Fix migration guide rendering (#805)

Author: sfod

documents/MIGRATION_GUIDE.md

@@ -168,20 +168,20 @@ and other connection-related features.
 For more information, refer to the [Connecting To AWS IoT Core](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#connecting-to-aws-iot-core)
 section of the MQTT5 user guide for detailed information and code snippets on each connection type and connection feature.
 
-| Connection type/feature                                  | v1 SDK                                | v2 SDK                           | User guide |
-|----------------------------------------------------------|---------------------------------------|----------------------------------|:----------:|
-| MQTT over Secure WebSocket with AWS SigV4 authentication | $${\Large\color{green}&#10004}$$      | $${\Large\color{green}&#10004}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#mqtt-over-websockets-with-sigv4-authentication) |
-| MQTT with X.509 certificate based mutual authentication  | $${\Large\color{green}&#10004}$$      | $${\Large\color{green}&#10004}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-x509-based-mutual-tls) |
-| Websocket Connection with Cognito Authentication Method  | $${\Large\color{red}&#10008}$$        | $${\Large\color{green}&#10004}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#mqtt-over-websockets-with-cognito) |
-| MQTT with PKCS12 Method                                  | $${\Large\color{red}&#10008}$$        | $${\Large\color{green}&#10004}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-pkcs12-method) |
-| MQTT with Custom Authorizer Method                       | $${\Large\color{orange}&#10004\*}$$   | $${\Large\color{green}&#10004}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-custom-authentication) |
-| MQTT with Windows Certificate Store Method               | $${\Large\color{red}&#10008}$$        | $${\Large\color{green}&#10004}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-windows-certificate-store-method) |
-| MQTT with PKCS11 Method                                  | $${\Large\color{red}&#10008}$$        | $${\Large\color{green}&#10004}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-pkcs11-method) |
-| HTTP Proxy                                               | $${\Large\color{orange}&#10004\*\*}$$ | $${\Large\color{green}&#10004}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#adding-an-http-proxy) |
-
-${\Large\color{orange}&#10004\*}$ - To get this connection type work in the v1 SDK, you need to implement the
+| Connection type/feature                                  | v1 SDK                                            | v2 SDK                            | User guide |
+|----------------------------------------------------------|---------------------------------------------------|-----------------------------------|:----------:|
+| MQTT over Secure WebSocket with AWS SigV4 authentication | $${\Large\color{green}✔}$$                 | $${\Large\color{green}✔}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#mqtt-over-websockets-with-sigv4-authentication) |
+| MQTT with X.509 certificate based mutual authentication  | $${\Large\color{green}✔}$$                 | $${\Large\color{green}✔}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-x509-based-mutual-tls) |
+| Websocket Connection with Cognito Authentication Method  | $${\Large\color{red}✘}$$                   | $${\Large\color{green}✔}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#mqtt-over-websockets-with-cognito) |
+| MQTT with PKCS12 Method                                  | $${\Large\color{red}✘}$$                   | $${\Large\color{green}✔}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-pkcs12-method) |
+| MQTT with Custom Authorizer Method                       | $${\Large\color{orange}&#10004;}$$<sup>\*</sup>   | $${\Large\color{green}&#10004;}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-custom-authentication) |
+| MQTT with Windows Certificate Store Method               | $${\Large\color{red}&#10008;}$$                   | $${\Large\color{green}&#10004;}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-windows-certificate-store-method) |
+| MQTT with PKCS11 Method                                  | $${\Large\color{red}&#10008;}$$                   | $${\Large\color{green}&#10004;}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#direct-mqtt-with-pkcs11-method) |
+| HTTP Proxy                                               | $${\Large\color{orange}&#10004;}$$<sup>\*\*</sup> | $${\Large\color{green}&#10004;}$$ | [link](https://github.com/aws/aws-iot-device-sdk-cpp-v2/blob/main/documents/MQTT5_Userguide.md#adding-an-http-proxy) |
+
+${\Large\color{orange}&#10004;}$<sup>\*</sup> - To get this connection type work in the v1 SDK, you need to implement the
 [Custom Authentication workflow](https://docs.aws.amazon.com/iot/latest/developerguide/custom-authorizer.html).\
-${\Large\color{orange}&#10004\*\*}$ - The v1 SDK does not allow specifying HTTP proxy, but it is possible to configure
+${\Large\color{orange}&#10004;}$<sup>\*\*</sup> - The v1 SDK does not allow specifying HTTP proxy, but it is possible to configure
 systemwide proxy.
 
 ### Lifecycle Events
@@ -1445,4 +1445,3 @@ in the v2 SDK.
 > AWS Iot Core supports Shared Subscriptions for both MQTT3 and MQTT5. For more information, see
 > [Shared Subscriptions](https://docs.aws.amazon.com/iot/latest/developerguide/mqtt.html#mqtt5-shared-subscription)
 > from the AWS IoT Core developer guide
-