Update ruff requirement in the python group

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

Updates `ruff` to 0.15.0
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.11.8...0.15.0)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.0
  dependency-type: direct:development
  dependency-group: python
...

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

Author: dependabot[bot]

pyproject.toml

@@ -27,7 +27,7 @@ test = ["pytest", "pytest-cov", "pretend", "coverage[toml]"]
 lint = [
     # NOTE: ruff is under active development, so we pin conservatively here
     # and let Dependabot periodically perform this update.
-    "ruff >= 0.11.8,< 0.15.0",
+    "ruff >= 0.11.8,< 0.16.0",
     "mypy >= 1.0",
     "types-html5lib",
     "types-requests",