chore(deps): bump mypy from 1.18.2 to 1.19.1 in /requirements

Bumps [mypy](https://github.com/python/mypy) from 1.18.2 to 1.19.1.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.18.2...v1.19.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.19.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/mypy.txt

@@ -1,3 +1,3 @@
-mypy==1.18.2
+mypy==1.19.1
 celery-types==0.23.0
 django-stubs[compatible-mypy]==5.2.8