chore(deps): Bump grpcio in /backend/python/exllama

Bumps [grpcio](https://github.com/grpc/grpc) from 1.64.0 to 1.64.1.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.64.0...v1.64.1)

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

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

backend/python/exllama/requirements.txt

@@ -1,4 +1,4 @@
-grpcio==1.64.0
+grpcio==1.64.1
 protobuf
 torch
 transformers