GitLab: move anchor back to its correct place

wiki/src/blueprint/GitLab.mdwn

@@ -579,9 +579,6 @@ of forks, and follow the white GitHub rabbit(-hole):
 * <https://github.com/redmine-gitlab-migrator/redmine-gitlab-migrator>
 * <https://github.com/ultreia-io/migrate-redmine-to-gitlab>
 
-<a id="interfaces"></a>
-
-
 # Git repositories
 
 Migration includes preserving access rights.
@@ -627,6 +624,8 @@ to people with commit access that it's a read-only mirror):
  - `thunderbird`: very big, hopefully obsolete soon
  - `uui-binary`: obsolete
 
+<a id="interfaces"></a>
+
 # Interfaces that will need adjustments
 
 ## Git repository → various mirrors