Resolve "Broadcast message is misaligned on sign in page"

What does this MR do?

Fix misalignment of broadcast message on login page

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

see #49364 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Conforms to the code review guidelines
  • Has been reviewed by a UX Designer
  • Has been reviewed by a Frontend maintainer
  • Has been reviewed by a Backend maintainer
  • Has been reviewed by a Database specialist
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Internationalization required/considered
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

Closes #49364 (closed)