Bump types-protobuf from 7.34.1.20260408 to 7.34.1.20260518

Bumps [types-protobuf](https://github.com/python/typeshed) from 7.34.1.20260408 to 7.34.1.20260518.
- [Commits](https://github.com/python/typeshed/commits)

---
updated-dependencies:
- dependency-name: types-protobuf
  dependency-version: 7.34.1.20260518
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pyproject.toml

@@ -68,7 +68,7 @@ dev-mkdocs = [
 dev-mypy = [
   "mypy == 1.20.2",
   "types-Markdown == 3.10.2.20260408",
-  "types-protobuf == 7.34.1.20260408",
+  "types-protobuf == 7.34.1.20260518",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-client-reporting[dev-mkdocs,dev-noxfile,dev-pytest]",
   "pandas-stubs >= 2, < 4",  # Only required for example