docs: improve README grammar and clarity

[Aditya-mittal21]

Summary
Improved grammar, clarity, and consistency in the README.md file.

Why
These changes make the documentation more professional and beginner-friendly.

Related Issue
Fixes #13111

[algorithms-keeper]

Closing this pull request as invalid

@Aditya-mittal21, this pull request is being closed as none of the checkboxes have been marked. It is important that you go through the checklist and mark the ones relevant to this pull request. Please read the Contributing guidelines.

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