build(deps-dev): bump ruff from 0.15.10 to 0.15.11 in /stash

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.15.10 to 0.15.11.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.10...0.15.11)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.11
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

stash/pyproject.toml

@@ -55,7 +55,7 @@ dependencies = []
 # desired, alongside `python3 test_*.py`.
 [dependency-groups]
 dev = [
-    "ruff>=0.6",
+    "ruff>=0.15.11",
     "mypy>=1.10",
     "pytest>=8",
 ]