Bump mypy from 1.4.0 to 1.4.1

Bumps [mypy](https://github.com/python/mypy) from 1.4.0 to 1.4.1.
- [Commits](python/mypy@v1.4.0...v1.4.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pyproject.toml

@@ -35,7 +35,7 @@ email = "floss@frequenz.com"
 dev-docstrings = ["pydocstyle == 6.3.0", "darglint == 1.8.1"]
 dev-formatting = ["black == 23.3.0", "isort == 5.12.0"]
 dev-mypy = [
-  "mypy == 1.4.0",
+  "mypy == 1.4.1",
   # For checking the noxfile and tests
   "frequenz-api-common[dev-noxfile,dev-pytest]",
 ]