🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

.github/CODEOWNERS

@@ -5,8 +5,8 @@
 # https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners#codeowners-syntax
 # Note: This file is autogenerated. To make changes to the codeowner team, please update .repo-metadata.json.
 
-# @googleapis/yoshi-python is the default owner for changes in this repo
-*     @googleapis/yoshi-python
+# @googleapis/yoshi-python @googleapis/googleapis-auth are the default owners for changes in this repo
+*     @googleapis/yoshi-python @googleapis/googleapis-auth
 
-# @googleapis/python-samples-reviewers is the default owner for samples changes
-/samples/   @googleapis/python-samples-reviewers
+# @googleapis/python-samples-reviewers @googleapis/googleapis-auth are the default owners for samples changes
+/samples/   @googleapis/python-samples-reviewers @googleapis/googleapis-auth