Bump grpcio from 1.60.2 to 1.68.1

Bumps [grpcio](https://github.com/grpc/grpc) from 1.60.2 to 1.68.1.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.60.2...v1.68.1)

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

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

Author: dependabot[bot]

poetry.lock

@@ -82,7 +82,7 @@ opentelemetry-api = "~1.16.0"
 opentelemetry-sdk = "~1.16.0"
 opentelemetry-exporter-jaeger = "~1.16.0"
 opentelemetry-exporter-otlp = "~1.16.0"
-grpcio = "~1.60.0"
+grpcio = ">=1.60,<1.69"
 protobuf = "~4.25.3"
 pydantic = "^2.6.4"
 grpcio-health-checking = "~1.59.3"