chore: update blunderbuss config with new teams (#219)

b/478003109

Author: suztomo

.github/blunderbuss.yml

@@ -1,20 +1,16 @@
 # Blunderbuss config
-#
-# This file controls who is assigned for pull requests and issues.
-# Note: This file is autogenerated. To make changes to the assignee
-# team, please update `codeowner_team` in `.repo-metadata.json`.
 assign_issues:
-  - googleapis/python-core-client-libraries
-  - googleapis/api-bigquery-dataframe
+  - googleapis/cloud-sdk-python-team
+  - googleapis/bigquery-dataframe-team
 
 assign_issues_by:
   - labels:
       - "samples"
     to:
       - googleapis/python-samples-reviewers
-      - googleapis/python-core-client-libraries
-      - googleapis/api-bigquery-dataframe
+      - googleapis/cloud-sdk-python-team
+      - googleapis/bigquery-dataframe-team
 
 assign_prs:
-  - googleapis/python-core-client-libraries
-  - googleapis/api-bigquery-dataframe
+  - googleapis/cloud-sdk-python-team
+  - googleapis/bigquery-dataframe-team