Bump mypy from 1.18.2 to 1.20.2

Bumps [mypy](https://github.com/python/mypy) from 1.18.2 to 1.20.2.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.18.2...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] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -85,7 +85,7 @@ lint = [
     "pylint-pytest==2.0.0a0",
     "black~=25.9.0",
     "ruff~=0.13.2",
-    "mypy~=1.18.2",
+    "mypy>=1.18.2,<1.21.0",
     "databricks-labs-pylint~=0.5.0",
     "types-requests>=2.28.1,<3",
     "types-pyYAML~=6.0.12",