build(deps): bump mypy from 1.8.0 to 1.9.0 in /pip

Bumps [mypy](https://github.com/python/mypy) from 1.8.0 to 1.9.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.8.0...1.9.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

pip/requirements.txt

@@ -17,7 +17,7 @@ flake8-return==1.2.0
 flake8-simplify==0.21.0
 flake8==7.0.0
 magic-wormhole==0.13.0
-mypy==1.8.0
+mypy==1.9.0
 pep8-naming==0.13.3
 pylint==3.1.0
 vim-vint==0.3.21