chore: Tuleap 16.12 has been released

Author: LeSuisse

languages/en/deployment-guide/16.x.rst

@@ -1,12 +1,17 @@
 Tuleap 16.x
 ###########
 
-Tuleap 16.12 - September 2025
-=============================
+Tuleap 16.13 - October 2025
+===========================
 
 .. NOTE::
 
-  Tuleap 16.12 is currently under development.
+  Tuleap 16.13 is currently under development.
+
+Nothing to mention.
+
+Tuleap 16.12 - September 2025
+=============================
 
 Nothing to mention.