Update protobuf requirement from <6.0.0,>=4.21 to >=4.21,<7.0.0

Updates the requirements on [protobuf](https://github.com/protocolbuffers/protobuf) to permit the latest version.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v4.22.0-rc1...v6.30.2)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-version: 6.30.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

setup.py

@@ -92,7 +92,7 @@ def run(self):
         'scikit-learn',
         'flatten_json',
         'tensorboardX',
-        'protobuf>=4.21,<6.0.0',
+        'protobuf>=4.21,<7.0.0',
         'grpcio>=1.56.2,<1.66.0',
     ],
     python_requires='>=3.10, <3.13',