Bump zizmor from 1.19.0 to 1.20.0

Bumps [zizmor](https://github.com/zizmorcore/zizmor) from 1.19.0 to 1.20.0.
- [Release notes](https://github.com/zizmorcore/zizmor/releases)
- [Changelog](https://github.com/zizmorcore/zizmor/blob/main/docs/release-notes.md)
- [Commits](zizmorcore/zizmor@v1.19.0...v1.20.0)

---
updated-dependencies:
- dependency-name: zizmor
  dependency-version: 1.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -79,7 +79,7 @@ optional-dependencies.dev = [
     "vws-python-mock==2025.3.10.1",
     "vws-test-fixtures==2023.3.5",
     "yamlfix==1.19.1",
-    "zizmor==1.19.0",
+    "zizmor==1.20.0",
 ]
 optional-dependencies.release = [ "check-wheel-contents==0.6.3" ]
 urls.Documentation = "https://vws-python.github.io/vws-python/"