GitLab: fix links

wiki/src/contribute/git.mdwn

@@ -48,7 +48,7 @@ GitLab
 
 Most of our repositories live in [[!tails_gitlab desc="our GitLab"]].
 
-See the [[documentation about how we're using GitLab|contribute/GitLab]].
+See the [[documentation about how we're using GitLab|contribute/working_together/GitLab]].
 
 <a id="immerda"></a>
 

wiki/src/contribute/working_together/roles/sysadmins.mdwn

@@ -229,8 +229,8 @@ Below, importance level is evaluated based on:
   - host Tails issues
   - host most Tails [[Git repositories|contribute/git]]
 * access: public + some data with more restricted access
-* operations documentation: [[contribute/GitLab#operations]]
-* end-user documentation: [[contribute/GitLab]]
+* operations documentation: [[contribute/working_together/GitLab#operations]]
+* end-user documentation: [[contribute/working_together/GitLab]]
 * configuration:
   - immerda hosts our GitLab instance using [this Puppet
     code](https://code.immerda.ch/immerda/ibox/puppet-modules/-/blob/master/ib_gitlab/manifests/instance.pp).