quote codeowners_team in generation config

Author: diegomarquezp

generation_config.yaml

@@ -16,7 +16,7 @@ libraries:
     transport: grpc
     library_type: GAPIC_COMBO
     api_description: allows you to store, search, analyze, monitor, and alert on log data and events from Google Cloud and Amazon Web Services. Using the BindPlane service, you can also collect this data from over 150 common application components, on-premises systems, and hybrid cloud systems. BindPlane is included with your Google Cloud project at no additional cost.
-    codeowner_team: @googleapis/api-logging @googleapis/yoshi-java @googleapis/api-logging-partners
+    codeowner_team: '@googleapis/api-logging @googleapis/yoshi-java @googleapis/api-logging-partners'
     recommended_package: com.google.cloud.logging
     GAPICs:
       - proto_path: google/logging/v2