Bump the python-root group across 1 directory with 2 updates

Bumps the python-root group with 2 updates in the / directory: [isort](https://github.com/PyCQA/isort) and [protobuf](https://github.com/protocolbuffers/protobuf).


Updates `isort` from 6.1.0 to 7.0.0
- [Release notes](https://github.com/PyCQA/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](PyCQA/isort@6.1.0...7.0.0)

Updates `protobuf` from 6.32.1 to 6.33.0
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](https://github.com/protocolbuffers/protobuf/commits)

---
updated-dependencies:
- dependency-name: isort
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: python-root
- dependency-name: protobuf
  dependency-version: 6.33.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  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==7.3.0
-isort==6.1.0
+isort==7.0.0
 build==1.3.0
 twine==6.2.0
 wheel==0.45.1
 setuptools==80.9.0
-protobuf==6.32.1
+protobuf==6.33.0
 setuptools_scm[toml]>=6.2