Bump google.golang.org/grpc from 1.81.0 to 1.81.1 (#6133)

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.81.0 to 1.81.1.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.81.0...v1.81.1)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-version: 1.81.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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