chore(deps): bump grpcio from 1.74.0 to 1.75.0 in /backend/python/bark

Bumps [grpcio](https://github.com/grpc/grpc) from 1.74.0 to 1.75.0.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.74.0...v1.75.0)

---
updated-dependencies:
- dependency-name: grpcio
  dependency-version: 1.75.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/python/bark/requirements.txt

@@ -1,4 +1,4 @@
 bark==0.1.5
-grpcio==1.74.0
+grpcio==1.75.0
 protobuf
 certifi