Bump mypy from 1.12.0 to 1.12.1

Bumps [mypy](https://github.com/python/mypy) from 1.12.0 to 1.12.1.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.12.0...v1.12.1)

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

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

requirements_testing.txt

@@ -8,4 +8,4 @@ ruff==0.6.9
 setuptools==75.1.0
 tox==4.21.2
 tox-gh-actions==3.2.0
-mypy==1.12.0
+mypy==1.12.1