chore: add default_version to .repo-metadata.json (#181)

* chore: add default_version and codeowner_team to .repo-metadata.json

* update default_version

packages/google-cloud-build/.repo-metadata.json

@@ -1,15 +1,16 @@
 {
-  "name": "cloudbuild",
-  "name_pretty": "Cloud Build",
-  "product_documentation": "https://cloud.google.com/cloud-build/docs/",
-  "client_documentation": "https://googleapis.dev/python/cloudbuild/latest",
-  "issue_tracker": "https://issuetracker.google.com/savedsearches/5226584",
-  "release_level": "ga",
-  "language": "python",
-  "library_type": "GAPIC_AUTO",
-  "repo": "googleapis/python-cloudbuild",
-  "distribution_name": "google-cloud-build",
-  "api_id": "cloudbuild.googleapis.com",
-  "codeowner_team": "@googleapis/cicd",
-  "requires_billing": false
+    "name": "cloudbuild",
+    "name_pretty": "Cloud Build",
+    "product_documentation": "https://cloud.google.com/cloud-build/docs/",
+    "client_documentation": "https://googleapis.dev/python/cloudbuild/latest",
+    "issue_tracker": "https://issuetracker.google.com/savedsearches/5226584",
+    "release_level": "ga",
+    "language": "python",
+    "library_type": "GAPIC_AUTO",
+    "repo": "googleapis/python-cloudbuild",
+    "distribution_name": "google-cloud-build",
+    "api_id": "cloudbuild.googleapis.com",
+    "codeowner_team": "@googleapis/cicd",
+    "requires_billing": false,
+    "default_version": "v1"
 }