Bump grpcio from 1.54.2 to 1.54.3

Bumps [grpcio](https://github.com/grpc/grpc) from 1.54.2 to 1.54.3.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.54.2...v1.54.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -18,7 +18,7 @@ google-cloud-ndb==2.1.1
 google-cloud-secret-manager==2.16.1
 googleapis-common-protos==1.59.0
 grpc-google-iam-v1==0.12.6
-grpcio==1.54.2
+grpcio==1.54.3
 grpcio-status==1.54.2
 httplib2==0.22.0
 idna==3.4