Fix MR link for squash Git push option

What does this MR do and why?

This MR fixes the link to the MR that introduced the squash Git push option, since other lines include a link to the MR instead of the issue. It also adds a missing dot.

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

n/a

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

n/a