Document github repo settings

[cijothomas]

Fixes #
Design discussion issue (if applicable) #

Changes

Please provide a brief description of the changes here.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[lalitb]

Do we need to add it in the repo settings tracking, as it is already tracked through GitHub history?

[lalitb]

Do we need to add it in the repo settings tracking, as it is already tracked through GitHub history?

Ah ignore, we modified the branch policy.