Use different syntax to pass env and register var

deploy.d/plays/predeploy.yml

@@ -19,15 +19,15 @@
     database: passwd
     key: git
     split: ":"
+  register: getent_passwd
 
 - name: Store gitea git user uid/guid in config.env
   set_fact:
-    config: "{{
-      config | update_env({
-        'USER_GID': getent_passwd['git'][1],
-        'USER_UID': getent_passwd['git'][2],
-      })
+    git_user_info: "{{
+      'USER_GID': getent_passwd['git'][1],
+      'USER_UID': getent_passwd['git'][2]
     }}"
+    config: "{{ config | update_env(git_user_info) }}"
 
 - name: Output config for debugging purposes
   debug: