Bump mypy from 1.19.1 to 1.20.2

Bumps [mypy](https://github.com/python/mypy) from 1.19.1 to 1.20.2.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.19.1...v1.20.2)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.20.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements_dev.txt

@@ -101,7 +101,7 @@ more-itertools==11.0.1
     # via
     #   d8s-dicts
     #   d8s-lists
-mypy==1.20.0
+mypy==1.20.2
 mypy-extensions==1.1.0
     # via mypy
 packaging==26.2