Update protobuf requirement from <5.27.0 to <5.28.0 (#76)

* Update protobuf requirement from <5.27.0 to <5.28.0

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@v2.4.1...v5.27.0)

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

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

* Apply suggestions from code review

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jirka Borovec <6035284+Borda@users.noreply.github.com>

requirements.txt

@@ -3,7 +3,7 @@ jsonargparse[signatures]
 wandb <0.18.0
 gradio <=3.45.2
 pyyaml <=6.0.1
-protobuf <5.27.0  # 4.21 breaks with wandb, tensorboard, or pytorch-lightning: https://github.com/protocolbuffers/protobuf/issues/10048
+protobuf >4.21, <5.28.0  # 4.21 breaks with wandb, tensorboard, or pytorch-lightning: https://github.com/protocolbuffers/protobuf/issues/10048
 websockets
 lightning[app] >=2.1.0
 tensorboard