Bump the python-root group across 1 directory with 3 updates

Bumps the python-root group with 3 updates in the / directory: [flake8](https://github.com/pycqa/flake8), [setuptools](https://github.com/pypa/setuptools) and [protobuf](https://github.com/protocolbuffers/protobuf).


Updates `flake8` from 7.1.2 to 7.2.0
- [Commits](PyCQA/flake8@7.1.2...7.2.0)

Updates `setuptools` from 76.0.0 to 78.1.0
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v76.0.0...v78.1.0)

Updates `protobuf` from 6.30.1 to 6.30.2
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v6.30.1...v6.30.2)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: python-root
- dependency-name: setuptools
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: python-root
- dependency-name: protobuf
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python-root
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,10 +1,10 @@
 # Requirements for linting, building, and uploading the PGV python package to PyPI.
 # The package's own requirements are in python/setup.cfg (and also in python/requirements.in).
-flake8==7.1.2
+flake8==7.2.0
 isort==6.0.1
 build==1.2.2.post1
 twine==6.1.0
 wheel==0.45.1
-setuptools==76.0.0
-protobuf==6.30.1
+setuptools==80.4.0
+protobuf==6.30.2
 setuptools_scm[toml]>=6.2