build(deps-dev): bump mypy-protobuf from 3.6.0 to 4.0.0

Bumps [mypy-protobuf](https://github.com/nipunn1313/mypy-protobuf) from 3.6.0 to 4.0.0.
- [Changelog](https://github.com/nipunn1313/mypy-protobuf/blob/main/CHANGELOG.md)
- [Commits](https://github.com/nipunn1313/mypy-protobuf/compare/v3.6.0...v4.0.0)

---
updated-dependencies:
- dependency-name: mypy-protobuf
  dependency-version: 4.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

pyproject.toml

@@ -141,7 +141,7 @@ dev = [
     "black==25.12.0",
     "isort==7.0.0",
     "mypy==1.19.1",
-    "mypy-protobuf==3.6.0",
+    "mypy-protobuf==4.0.0",
     "PyGithub==2.6.0",
     "bump-my-version==1.2.4",
     # type stubs for mypy