build(deps): bump protobuf from 4.25.3 to 5.28.2 in /install

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 4.25.3 to 5.28.2.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v4.25.3...v5.28.2)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

install/requirements.txt

@@ -25,7 +25,7 @@ pytest-xdist==3.6.1
 scipy==1.14.0
 scikit-learn==1.5.1
 GitPython==3.1.43
-protobuf==4.25.3
+protobuf==5.28.2
 exclusiveprocess==0.9.4
 setuptools
 pytest-dependency==0.6.0