build(deps-dev): bump ruff from 0.15.19 to 0.15.20 (#1824)

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.15.19 to 0.15.20.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.19...0.15.20)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.20
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pyproject.toml

@@ -66,7 +66,7 @@ dev = [
   "mypy>=1.1,<3.0",
   # NOTE(ww): ruff is under active development, so we pin conservatively here
   # and let Dependabot periodically perform this update.
-  "ruff<0.15.20",
+  "ruff<0.15.21",
   "types-pyOpenSSL",
   "mkdocs-material[imaging]",
   "mkdocstrings-python",