Bump mypy from 1.11.2 to 1.12.0

Bumps [mypy](https://github.com/python/mypy) from 1.11.2 to 1.12.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.11.2...v1.12.0)

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

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,7 +1,7 @@
 pytest==8.3.3
 pytest-cov==5.0.0
 coverage==7.6.1
-mypy==1.11.2
+mypy==1.12.0
 pydocstyle==6.1.1
 flake8==7.1.1
 pylint==3.2.7