build(deps-dev): update mypy requirement from ~=1.8.0 to ~=1.9.0

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [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
...

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

requirements-dev.txt

@@ -4,4 +4,4 @@ types-xmltodict==0.13.0.3
 
 ruff~=0.3.2
 black~=24.2.0
-mypy~=1.8.0
+mypy~=1.9.0