Update contribution guidelines section in README

[vardhan30016]

Fixed formatting consistency by standardizing the link text to use lowercase 'guidelines' to match standard markdown link formatting conventions.

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.90%. Comparing base (c06c0f0) to head (4447b5e).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7139      +/-   ##
============================================
- Coverage     78.91%   78.90%   -0.01%     
+ Complexity     6883     6882       -1     
============================================
  Files           774      774              
  Lines         22746    22746              
  Branches       4468     4468              
============================================
- Hits          17949    17948       -1     
  Misses         4077     4077              
- Partials        720      721       +1     

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[anandfresh]

Why do we need this change ?

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution!

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution!

[github-actions]

Please reopen this pull request once you have made the required changes. If you need help, feel free to ask in our Discord server or ping one of the maintainers here. Thank you for your contribution!