Bump mypy from 1.7.1 to 1.9.0 in /misc/requirements (#784)

Bumps [mypy](https://github.com/python/mypy) from 1.7.1 to 1.9.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.7.1...1.9.0)

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

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

misc/requirements/requirements_mypy.txt

@@ -1,2 +1,2 @@
-mypy==1.7.1
+mypy==1.9.0
 PyQt5-stubs==5.15.6.0