chore(deps): bump grpcio from 1.74.0 to 1.75.1 in /backend/python/exllama2 (#6356)

chore(deps): bump grpcio in /backend/python/exllama2

Bumps [grpcio](https://github.com/grpc/grpc) from 1.74.0 to 1.75.1.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.74.0...v1.75.1)

---
updated-dependencies:
- dependency-name: grpcio
  dependency-version: 1.75.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/python/exllama2/requirements.txt

@@ -1,4 +1,4 @@
-grpcio==1.74.0
+grpcio==1.75.1
 protobuf
 certifi
 wheel