Project overview Edit button fix

What does this MR do and why?

Project overview Edit button fix: Adjustments to the help text in the dropdown:

• Use gl-text-secondary instead of gl-text-gray-700
• Use gl-font-sm

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. http://gdk.test:3000/flightjs/test

MR 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 MR.

UX Paper Cuts 16.5 → Cleanup (#424403 - closed)