Links in commit messages don't look like links

We currently style .commit a to remove the color, which means links to Issues & MRs in commit messages are not clearly links

For example: !57647 (c0524e4d)

Screen_Shot_2021-05-10_at_11.30.17_am

We should keep the commit message links normal link color, as shown here:

Screen_Shot_2021-05-10_at_11.31.03_am

From !57647 (comment 570961036)