chore(deps-dev): bump types-protobuf

Bumps [types-protobuf](https://github.com/typeshed-internal/stub_uploader) from 6.32.1.20250918 to 6.32.1.20260221.
- [Commits](https://github.com/typeshed-internal/stub_uploader/commits)

---
updated-dependencies:
- dependency-name: types-protobuf
  dependency-version: 6.32.1.20260221
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pyproject.toml

@@ -79,7 +79,7 @@ dev-mypy = [
   "mypy == 1.19.1",
   "grpc-stubs == 1.53.0.6",
   "types-Markdown == 3.10.2.20260211",
-  "types-protobuf == 6.32.1.20250918",
+  "types-protobuf == 6.32.1.20260221",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-client-assets[dev-mkdocs,dev-noxfile,dev-pytest,cli]",
 ]