Bump ruff from 0.4.8 to 0.4.9

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.4.8 to 0.4.9.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@v0.4.8...v0.4.9)

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

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

Author: dependabot[bot]

requirements.txt

@@ -9,7 +9,7 @@ statsmodels==0.14.2
 pytest==8.2.2
 pytest-cov==5.0.0
 zarr==2.18.2
-ruff==0.4.8
+ruff==0.4.9
 netcdf4==1.6.5
 h5netcdf==1.3.0
 impactlab-tools==0.6.0