Update grpcio requirement from 1.73.0 to 1.73.1 (#263)

Updates the requirements on [grpcio](https://github.com/grpc/grpc) to permit the latest version.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.73.0...v1.73.1)

---
updated-dependencies:
- dependency-name: grpcio
  dependency-version: 1.73.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -23,7 +23,7 @@ classifiers = [
 [tool.poetry.dependencies]
 python = "^3.9"
 protobuf = "5.29.5"
-grpcio = "1.73.0"
+grpcio = "1.73.1"
 grpcio-tools = "1.71.0"
 jsonpickle = ">=3.0,<4.2"
 pymitter = ">=0.4,<1.1"