Updates screenshots of the comment text editor

What does this MR do and why?

This MR updates the screenshots of the text editor for comments in:

• Associate a Zoom meeting with an issue
• Tutorial: Make a GitLab contribution

Relates to MR: Update screenshots of comment (#411674 - closed)

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.