Fix minor punctuation in README && Fix minor typo in documentation

[khujrat17]

Why:

Minor punctuation improvement for clarity and consistency.

What's being changed:

Added a missing punctuation mark in the README to improve readability.

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

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