requirements: update grpcio requirement from <1.66.0 to <1.67.0 (#3034)

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@v0.65.0...v1.66.0)

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

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

requirements.txt

@@ -3,7 +3,7 @@ dill<0.3.9
 fastkde>=1.0.24, <1.0.31
 graph-scheduler>=1.2.1, <1.3.0
 graphviz<0.21.0
-grpcio<1.66.0
+grpcio<1.67.0
 leabra-psyneulink<0.3.3
 llvmlite<0.44
 matplotlib<3.7.6