build(deps-dev): bump mypy from 1.20.2 to 2.1.0

Bumps [mypy](https://github.com/python/mypy) from 1.20.2 to 2.1.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.20.2...v2.1.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 2.1.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -72,7 +72,7 @@ mss = "mss.__main__:main"
 dev = [
   "build==1.5.0",
   "lxml==6.1.1",
-  "mypy==1.20.2",
+  "mypy==2.1.0",
   "ruff==0.15.16",
   "twine==6.2.0",
   "typing_extensions==4.15.0",