Update dependency mypy to v1.20.1 (#4419)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pyproject.toml

@@ -33,7 +33,7 @@ Source = "https://github.com/archlinux/archinstall"
 [project.optional-dependencies]
 log = ["systemd_python==235"]
 dev = [
-    "mypy==1.20.0",
+    "mypy==1.20.1",
     "flake8==7.3.0",
     "pre-commit==4.5.1",
     "ruff==0.15.10",