chore: update .repo-metadata.json (#209)

Author: parthea

packages/google-cloud-error-reporting/.repo-metadata.json

@@ -4,13 +4,14 @@
     "product_documentation": "https://cloud.google.com/error-reporting",
     "client_documentation": "https://cloud.google.com/python/docs/reference/clouderrorreporting/latest",
     "issue_tracker": "https://issuetracker.google.com/savedsearches/559780",
-    "release_level": "beta",
+    "release_level": "preview",
     "language": "python",
     "library_type": "GAPIC_COMBO",
     "repo": "googleapis/python-error-reporting",
     "distribution_name": "google-cloud-error-reporting",
     "api_id": "clouderrorreporting.googleapis.com",
     "requires_billing": false,
     "codeowner_team": "@googleapis/api-logging",
-    "default_version": "v1beta1"
+    "default_version": "v1beta1",
+    "api_shortname": "clouderrorreporting"
 }