Updated styling commit SHA on branches page

What does this MR do?

Updated styling of commit SHA on the branches page to include the commit icon and be blue

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

Why was this MR needed?

to make the branches page in line with upcoming update to the commit list, which also styles the commit sha, but slightly different.

Screenshots (if relevant)

before:

after:

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #24022 (closed)