build(deps): Update grpcio requirement

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@v1.53.2...v1.64.1)

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

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

pyproject.toml

@@ -27,7 +27,7 @@ dependencies = [
   "aiofiles==22.1",
   "aiohttp<3.10,>=3.9.5",
   "cryptography<43,>=42.0.4",
-  "grpcio<1.54,>=1.53.2",
+  "grpcio>=1.64.1,<1.65",
   "protobuf<4.22,>=4.21.12",
   "pydantic==2.7",
   "pydantic-settings==2.2.1",