chore(deps): update dependency grpcio to v1.34.0 (#109)

Author: renovate-bot

dataproc/snippets/requirements.txt

@@ -1,4 +1,4 @@
-grpcio==1.33.2
+grpcio==1.34.0
 google-auth==1.23.0
 google-auth-httplib2==0.0.4
 google-cloud==0.34.0