build(deps-dev): Bump mypy from 1.18.2 to 1.19.1

Bumps [mypy](https://github.com/python/mypy) from 1.18.2 to 1.19.1.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.18.2...v1.19.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.19.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -24,7 +24,7 @@ mergify = "mergify_cli.cli:main"
 
 [dependency-groups]
 dev = [
-    "mypy==1.18.2",
+    "mypy==1.19.1",
     "mypy-extensions==1.1.0",
     "ruff==0.14.9",
     "pytest==9.0.2",