bump version tag

effelsberg_production/group_vars/all.yml

@@ -6,7 +6,7 @@
 # provisioning systems. The default "latest" is set in the common role and
 # overriden here for the production environment.
 
-version_tag: "210914.0"
+version_tag: "210915.0"
 
   # These settings specify the repositories used to build the EDD
 # In particular useful to be tweaked in a local custom mysite_dev inventory to develop  the provisioning system.