Update gitlab/gitlab-ce Docker tag to v16.7.3

This MR contains the following updates:

Package	Update	Change
gitlab/gitlab-ce (changelog)	patch	16.7.2-ce.0 -> 16.7.3-ce.0

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webserver/docker_gitlab/templates/docker-compose.yml

@@ -5,7 +5,7 @@ services:
 
   app:
 
-    image: gitlab/gitlab-ce:16.7.2-ce.0
+    image: gitlab/gitlab-ce:16.7.3-ce.0
     restart: always
     ports:
       - "444:22"