chore(deps): update dependency google-cloud-datastore to v2.13.0 (#478)

Author: renovate-bot

dlp/snippets/requirements.txt

@@ -1,5 +1,5 @@
 google-cloud-dlp==3.11.0
 google-cloud-storage==2.7.0
 google-cloud-pubsub==2.13.12
-google-cloud-datastore==2.12.0
+google-cloud-datastore==2.13.0
 google-cloud-bigquery==3.4.1