docs: fix spelling errors in README

[snowykr]

Summary

Fix two spelling errors in the README file.

Changes

• Fixed "recieving" → "receiving" in the Why? section
• Fixed "to due" → "due to" in the Primitives section

Before/After

Before:

• "functions are recieving the appropriate types"
• "We won't list them here to due how many there are"

After:

• "functions are receiving the appropriate types"
• "We won't list them here due to how many there are"

[coveralls]

Pull Request Test Coverage Report for Build 15240697792

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 99.731%

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Totals
Change from base Build 13794871553:	0.0%
Covered Lines:	371
Relevant Lines:	372

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💛 - Coveralls