Bump mypy from 1.8 to 1.9.0 in /requirements (#144)

Bumps [mypy](https://github.com/python/mypy) from 1.8 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:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: thomasgaudelet <69150449+thomasgaudelet@users.noreply.github.com>

requirements/dev_requirements.txt

@@ -2,7 +2,7 @@ black==24.3.0
 flake8==7.0.0
 flake8-bugbear==24.2.6
 isort==5.13.2
-mypy==1.8
+mypy==1.9.0
 parameterized==0.9.0
 pre-commit==2.21.0
 protobuf>=3.19.0