Update runner documentation with 14.5 UI changes

What does this MR do and why?

This change updates the docs with the changes in the UI of the Runner administration that were added in 14.5.

Screenshots or screen recordings

NA

How to set up and validate locally

NA

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.

Related to #343262 (closed)