Update README.md title formatting

[liha23]

Removed HTML comment from the title in README.md.

Why:

Closes:

What's being changed (if available, include any code snippets, screenshots, or gifs):

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• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• 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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Pull Request Overview

This PR removes an HTML comment from the main title in the README.md file to clean up the formatting. The change removes the <!-- omit in toc --> comment that was appended to the "GitHub Docs" heading.

• Removes HTML comment from the main README title for cleaner formatting

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