Update ruff requirement from ~=0.8.6 to ~=0.9.0 in the python group

Updates the requirements on [ruff](https://github.com/astral-sh/ruff) to permit the latest version.

Updates `ruff` to 0.9.0
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.8.6...0.9.0)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:production
  dependency-group: python
...

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

pyproject.toml

@@ -31,7 +31,7 @@ test = ["pytest", "pytest-cov", "pretend", "coverage[toml]", "requests-mock"]
 lint = [
     # NOTE: ruff is under active development, so we pin conservatively here
     # and let Dependabot periodically perform this update.
-    "ruff ~= 0.8.6",
+    "ruff ~= 0.9.0",
     "mypy >= 1.0",
     "types-html5lib",
     "types-requests",