chore(deps): update dependency grpcio to v1.48.1 (#228)

Co-authored-by: Anthonios Partheniou <[email protected]>

Author: renovate-bot

video/transcoder/requirements.txt

@@ -1,3 +1,3 @@
 google-api-python-client==2.58.0
-grpcio==1.47.0
+grpcio==1.48.1
 google-cloud-video-transcoder==1.4.1