fix etherpad postgres wiring

group_vars/matrix_servers

@@ -4388,7 +4388,7 @@ postgres_managed_databases_auto: |
       'name': etherpad_database_name,
       'username': etherpad_database_username,
       'password': etherpad_database_password,
-    }] if (etherpad_enabled and etherpad_database_engine == 'postgres' and etherpad_database_hostname == postgres_connection_hostname) else [])
+    }] if (etherpad_enabled and etherpad_database_type == 'postgres' and etherpad_database_hostname == postgres_connection_hostname) else [])
     +
     ([{
       'name': prometheus_postgres_exporter_database_name,