Governance Framework: add subsection to add OZ article about 'Council Best Practices in Rollup Governance'

## What content are you looking to add?
An article that [@optechhh](https://x.com/@optechhh) [@LewellenMichael](https://x.com/@LewellenMichael) wrote in OZ about council best practices in roll up governance.

## Why do you think it is important?
Self explanatory.

## Can you cite resources where to base the content from?
https://x.com/OpenZeppelin/status/1889751270484791588