feat: Add section separator in list output when showing updates

docker-manager/docker-manager.py

@@ -285,6 +285,8 @@ def list_containers(projects, show_updates_only=False):
         # If not hiding, OR if update, add to table
         if not show_updates_only or project_has_update:
             if project_rows:
+                if found_any:
+                    table.add_section()
                 found_any = True
                 for row in project_rows:
                     table.add_row(*row)