docs: add explanation about MIT License for clarity

[Madhu696969]

This pull request adds a short explanation about the MIT License section in the README to make it clearer for contributors and readers.

Changes made

Added a brief note explaining the scope of the MIT License and what it covers.

Ensured formatting aligns with existing README style and tone.

Reason for change

The README mentions the MIT License but does not clarify its purpose.
This update helps contributors better understand how the code portions of the repository are licensed differently from documentation content (which uses Creative Commons Attribution 4.0).

Checklist
Followed contribution guidelines
Markdown formatting verified
Content reviewed for clarity and tone

[welcome]

Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[github-actions]

How to review these changes 👓

Thank you for your contribution. To review these changes, choose one of the following options:

• Spin up a codespace
• Set up a local development environment

A Hubber will need to deploy your changes internally to review.

Table of review links

Note: Please update the URL for your staging server or codespace.

This pull request contains code changes, so we will not generate a table of review links.

🤖 This comment is automatically generated.

[Sharra-writes]

@Madhu696969 Thanks for opening a PR! Unfortunately, the README isn't a good place for this explanation. It's easy to look up what an MIT License is, and we want our contributing docs to be essential information only.