Update protobuf requirement from <5.30.0,>=3.20.0 to >=3.20.0,<6.31.0

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@v3.20.0...v6.30.2)

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

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

Author: dependabot[bot]

requirements/base.txt

@@ -6,7 +6,7 @@ pytorch-lightning >=2.0.0, <2.5.0
 omegaconf >=2.3.0
 torchmetrics >=0.10.0, <1.7.0
 tensorboard >2.2.0, !=2.5.0
-protobuf >=3.20.0, <5.30.0
+protobuf >=3.20.0, <6.31.0
 pytorch-tabnet ==4.1
 PyYAML >=5.4, <6.1.0
 # importlib-metadata <1,>=0.12