chore(deps): update dependency grpcio to v1.36.0 (#536)

Author: renovate-bot

packages/google-cloud-bigquery/samples/snippets/requirements.txt

@@ -1,7 +1,7 @@
 google-cloud-bigquery==2.10.0
 google-cloud-bigquery-storage==2.3.0
 google-auth-oauthlib==0.4.2
-grpcio==1.35.0
+grpcio==1.36.0
 ipython==7.16.1; python_version < '3.7'
 ipython==7.17.0; python_version >= '3.7'
 matplotlib==3.3.4