Making cross-reference links distinctly visible

https://gitlab.com/gitlab-org/gitlab/-/issues/330455

Coloring only links in the description, not titles

We might still want to highlight cross-references in
other places, but it seems that this is more scoped
to what https://gitlab.com/gitlab-org/gitlab/-/issues/330455
specifies.

Changelog: changed
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/68063

app/assets/stylesheets/pages/commits.scss

@@ -250,6 +250,10 @@
   .commit-row-description {
     display: none;
     flex: 1;
+
+    a {
+      color: $blue-600;
+    }
   }
 
   &.inline-commit {