Fix branch title trailing space on hover

What does this MR do?

Removes the unnecessary encapsulation of the <span> inside of the <a> which was creating the trailing space on hover.

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

Shouldn't be

Why was this MR needed?

Makes the UI look more polished

What are the relevant issue numbers?

Closes #20676 (closed)

Screenshots (if relevant)

Before (When hovering on branch title):

After (When hovering on branch title):

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Tests
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together

LGTM

cc: @annabeldunstone

Added ~164274 frontend labels

Reassigned to @annabeldunstone

Added 499 commits:

• 00efc4b8...1b338d59 - 498 commits from branch gitlab-org:master
• 054d8fba - Fix branch title trailing space on hover

Looks great @ClemMakesApps!

Reassigned to @jschatz1

Added ~149423 label

@ClemMakesApps it's the little things that matter.

Status changed to merged

Picked into 8-12-stable, will go into RC6.

Removed ~149423 label

Mentioned in commit maxraab/gitlab-ce@e5840a4d