fix: Update connection metadata to change version from ~> 12.0 to ^12.0 (#486)

Author: amrkk123

modules/frontend/metadata.yaml

@@ -110,7 +110,7 @@ spec:
         connections:
           - source:
               source: github.com/terraform-google-modules/terraform-google-lb-http//modules/backend
-              version: ~> 12.0
+              version: ^12.0
             spec:
               outputExpr: backend_service_info
       - name: url_map_resource_uri