Bump grpcio from 1.39.0 to 1.53.0

Bumps [grpcio](https://github.com/grpc/grpc) from 1.39.0 to 1.53.0.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.39.0...v1.53.0)

---
updated-dependencies:
- dependency-name: grpcio
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/requirements.txt

@@ -35,7 +35,7 @@ flake8==3.9.2
 fvcore==0.1.5.post20210915
 google-auth==1.35.0
 google-auth-oauthlib==0.4.5
-grpcio==1.39.0
+grpcio==1.53.0
 identify==2.2.13
 idna==3.2
 imagesize==1.2.0

requirements.txt

@@ -33,7 +33,7 @@ fett==0.3.2
 filelock==3.12.2
 flake8==3.9.2
 fvcore==0.1.5.post20210915
-grpcio==1.39.0
+grpcio==1.53.0
 identify==2.2.13
 idna==3.2
 imagesize==1.2.0