Update release template

What does this MR do and why?

Updates the Docs Release XX.XX template with the following:

• The requirement to run yarn install and make setup
• A note about the lefthook tests

Driven by the 16.9 release process:

• #1752 (comment 1774337703)

Screenshots, screen recordings, or links to review app

N/A

How to set up and validate locally

N/A

Merge request acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this merge request.