chore: Update CODEOWNERS (#516)

* chore: Update CODEOWNERS

* 🦉 Updates from OwlBot post-processor

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

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: daniel-sanche

packages/google-cloud-datastore/.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 @googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk are the default owners for changes in this repo
-*     @googleapis/yoshi-python @googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk
+# @googleapis/yoshi-python @googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk @googleapis/api-firestore-partners are the default owners for changes in this repo
+*     @googleapis/yoshi-python @googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk @googleapis/api-firestore-partners
 
-# @googleapis/python-samples-reviewers @googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk are the default owners for samples changes
-/samples/   @googleapis/python-samples-reviewers @googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk
+# @googleapis/python-samples-reviewers @googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk @googleapis/api-firestore-partners are the default owners for samples changes
+/samples/   @googleapis/python-samples-reviewers @googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk @googleapis/api-firestore-partners

packages/google-cloud-datastore/.repo-metadata.json

@@ -11,7 +11,7 @@
     "distribution_name": "google-cloud-datastore",
     "api_id": "datastore.googleapis.com",
     "default_version": "v1",
-    "codeowner_team": "@googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk",
+    "codeowner_team": "@googleapis/cloud-native-db-dpes @googleapis/api-datastore-sdk @googleapis/api-firestore-partners",
     "api_shortname": "datastore",
     "api_description": "is a fully managed, schemaless database for\nstoring non-relational data. Cloud Datastore automatically scales with\nyour users and supports ACID transactions, high availability of reads and\nwrites, strong consistency for reads and ancestor queries, and eventual\nconsistency for all other queries."
 }