Merge pull request #753 from tensorflow/dependabot/pip/protobuf-3.19.5

Bump protobuf from 3.19.4 to 3.19.5

Author: jaeyoo

requirements.txt

@@ -12,4 +12,4 @@ google-api-core==1.21.0
 google-auth==1.18.0
 google-api-python-client==1.8.0
 grpcio==1.34.1
-protobuf==3.19.4
+protobuf==3.19.5