chore: update connection metadata

Author: q2w

modules/backend/metadata.yaml

@@ -153,9 +153,9 @@ spec:
         connections:
         - source:
             source: github.com/terraform-google-modules/terraform-google-vm//modules/mig
-            version: ~> 12.0
+            version: ">= 12.0"
           spec:
-            outputExpr: '{"group": instance_group}'
+            outputExpr: '{"group": instance_group, "description": "Input created by connection", "balancing_mode": "UTILIZATION", "capacity_scaler": 1.0, "max_connections": 1000, "max_connections_per_instance": 1000, "max_connections_per_endpoint": 1000, "max_rate": 1000, "max_rate_per_instance": 100, "max_rate_per_endpoint": 100, "max_utilization": 0.8}'
       - name: serverless_neg_backends
         description: The list of serverless backend which serves the traffic.
         varType: |-
@@ -169,7 +169,7 @@ spec:
         connections:
         - source:
             source: github.com/GoogleCloudPlatform/terraform-google-cloud-run//modules/v2
-            version: ~> 0.13
+            version: ">= 0.13"
           spec:
             outputExpr: '{"region": location, "service_name": service_name, "type": "cloud-run", "service_version": ""}'
       - name: iap_config