FT: document new @debian-packages-maintainers communication mean

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

@@ -79,9 +79,11 @@ The Tails Foundations Team is responsible for:
        LTS) we put it in, even if we drop the package from Tails:
        including a package in a stable Debian release implies
        a commitment to maintain it during its lifetime.
-  - The Debian BTS is the primary interface to communicate expectations to the
-    person who wears this hat. GitLab is another option but we should *not* rely
-    on it for proper tracking & clear communication of expectations.
+  - In order to communicate expectations to the person wears this hat,
+    Tails contributors can:
+      - use the Debian BTS
+      - mention `@debian-packages-maintainers` on our [[!tails_gitlab
+        desc="GitLab"]]
   - Not in the scope of this work:
     * [Debian AppArmor team](https://qa.debian.org/developer.php?email=pkg-apparmor-team%40lists.alioth.debian.org)'s packages,
       Perl libraries our custom software depends on: intrigeri does it