build(deps): bump isort from 5.13.2 to 6.0.0 (#2585)

Bumps [isort](https://github.com/pycqa/isort) from 5.13.2 to 6.0.0.
- [Release notes](https://github.com/pycqa/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](https://github.com/pycqa/isort/compare/5.13.2...6.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Willi Ballenthin <wballenthin@google.com>

pyproject.toml

@@ -138,7 +138,7 @@ dev = [
     "flake8-copyright==0.2.4",
     "ruff==0.9.2",
     "black==24.10.0",
-    "isort==5.13.2",
+    "isort==6.0.0",
     "mypy==1.14.1",
     "mypy-protobuf==3.6.0",
     "PyGithub==2.5.0",