site-admin: rename "Repository status" in sidebar to "Repositories"

Created by: mrnugget

The page is called "Repositories". The URL is /repositories. Every other "list page" we have in the site-admin area ("users", "orgs", ...) is also called "" and not " status".

Test plan

• Manual testing locally

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.