Fixes merge widget titles line height

What does this MR do and why?

Fixes the line height of the titles in the merge request widgets state components.

Screenshots or screen recordings

Before	After

How to set up and validate locally

• Vist a merge request
• Create a unresolved discussion
• View the merge request widget on a mobile device to see the line height

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.

Closes #376030 (closed)