Bump grpcio from 1.66.2 to 1.68.0

Bumps [grpcio](https://github.com/grpc/grpc) from 1.66.2 to 1.68.0.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.66.2...v1.68.0)

---
updated-dependencies:
- dependency-name: grpcio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -30,7 +30,7 @@ colorama==0.4.6
     # via supa (setup.cfg)
 cryptography==43.0.1
     # via paramiko
-grpcio==1.66.2
+grpcio==1.68.0
     # via
     #   grpcio-tools
     #   supa (setup.cfg)