Bump ruff from 0.12.11 to 0.12.12

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.12.11 to 0.12.12.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.12.11...0.12.12)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.12.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pyproject.toml

@@ -34,7 +34,7 @@ Homepage = "https://github.com/testing-cabal/testtools"
 [project.optional-dependencies]
 test = ["testscenarios", "testresources"]
 twisted = ["Twisted", "fixtures"]
-dev = ["ruff==0.12.11"]
+dev = ["ruff==0.12.12"]
 
 [tool.hatch.version]
 source = "vcs"