Fix Typographical Errors in Documentation

[Pricstas]

This pull request addresses minor typographical errors in the project documentation to improve clarity and accuracy.

Files Updated

1. README.md

   • Corrected the indefinite article usage: Changed "an (zk)-Ethereum Virtual Machine" to "a (zk)-Ethereum Virtual Machine" for grammatical accuracy.

2. CONTRIBUTING.md

   • Fixed the compound adjective formatting: Replaced "above mentioned" with "above-mentioned" to match standard English usage.

Time Spent

Approximately 15 minutes.

Pull Request Type

• Documentation content changes

Current Behavior

• Minor grammatical and typographical errors in project documentation.

New Behavior

• Documentation has been corrected for improved readability and professionalism.

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Checklist

• Self-reviewed changes for accuracy.
• Changes align with the project's contributing guidelines.
• No functional code changes were introduced.

This PR ensures the documentation adheres to proper grammatical standards, making it more user-friendly for developers and contributors.

[Eikix]

Sorry for the late reply and lack of review. We've been pausing the development of kakarot for now.

I'm cognizant that you spent some time doing this PR, so thank you. I will have to close it since I am cleaning a bit the repo and preparing for archival.

Archiving the repo will solve issue of people working on stuff while we are not accepting new PRs.
Thanks for understanding