chore(deps): update dependency grpcio to v1.46.0 (#187)

Author: renovate-bot

packages/google-cloud-video-transcoder/samples/snippets/requirements.txt

@@ -1,3 +1,3 @@
 google-api-python-client==2.47.0
-grpcio==1.44.0
+grpcio==1.46.0
 google-cloud-video-transcoder==1.3.1