Bump vale from 3.19.0.0 to 3.20.0.0

Bumps [vale](https://github.com/daniperez/vale-python-package) from 3.19.0.0 to 3.20.0.0.
- [Changelog](https://github.com/daniperez/vale-python-package/blob/main/CHANGELOG.md)
- [Commits](https://github.com/daniperez/vale-python-package/commits)

---
updated-dependencies:
- dependency-name: vale
  dependency-version: 3.20.0.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -83,7 +83,7 @@ optional-dependencies.dev = [
     "towncrier==25.8.0",
     "ty==0.0.77",
     "types-requests==2.33.0.20260712",
-    "vale==3.19.0.0",
+    "vale==3.20.0.0",
     "vulture==2.16",
     "vws-python-mock==2026.2.22.3",
     "yamlfix==1.19.1",