update comment

Author: shollyman

.github/CODEOWNERS

@@ -4,7 +4,7 @@
 # For syntax help see:
 # https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners#codeowners-syntax
 
-# The @googleapis/api-bigquery is the default owner for changes in this repo
+# The @googleapis/python-core-client-libraries is the default owner for changes in this repo
 *               @googleapis/python-core-client-libraries @googleapis/yoshi-python
 
 # The python-samples-reviewers team is the default owner for samples changes