Resolve "Extra whitespace when hovering commit sha in MR widget"

What does this MR do?

Removes extra whitespace when hovering commit sha in MR widget

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Conform by the code review guidelines
  • Has been reviewed by a Frontend maintainer
• Conform by the merge request performance guides
• Conform by the style guides

What are the relevant issue numbers?

Closes #46971 (closed)