Bump mypy from 1.11.2 to 1.12.0 in /requirements

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:production
  update-type: version-update:semver-minor
...

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

requirements/style.txt

@@ -1,3 +1,3 @@
 # style
-mypy==1.11.2
+mypy==1.12.0
 ruff==0.6.9