chore: update .repo-metadata.json (#677)

Author: parthea

.repo-metadata.json

@@ -2,15 +2,16 @@
     "name": "storage",
     "name_pretty": "Google Cloud Storage",
     "product_documentation": "https://cloud.google.com/storage",
-    "client_documentation": "https://googleapis.dev/python/storage/latest",
+    "client_documentation": "https://cloud.google.com/python/docs/reference/storage/latest",
     "issue_tracker": "https://issuetracker.google.com/savedsearches/559782",
-    "release_level": "ga",
+    "release_level": "stable",
     "language": "python",
     "library_type": "GAPIC_MANUAL",
     "repo": "googleapis/python-storage",
     "distribution_name": "google-cloud-storage",
     "api_id": "storage.googleapis.com",
     "requires_billing": true,
     "default_version": "",
-    "codeowner_team": "@googleapis/cloud-storage-dpe"
+    "codeowner_team": "@googleapis/cloud-storage-dpe",
+    "api_shortname": "storage"
 }