Docs: Simplify finding older package to restore

doc/update/restore_after_failure.md

@@ -10,7 +10,9 @@ the previous version you were using.
 
 First, roll back the code or package. For source installations this involves
 checking out the older version (branch or tag). For Omnibus installations this
-means installing the older `.deb` or `.rpm` package. Then, restore from a backup.
+means installing the older
+[`.deb` or `.rpm` package](https://packages.gitlab.com/gitlab). Then, restore from a
+backup.
 Follow the instructions in the
 [Backup and Restore](../raketasks/backup_restore.md#restore-gitlab)
 documentation.