CI: (deps): Bump dask from 2023.9.2 to 2023.9.3 in /ci

Bumps [dask](https://github.com/dask/dask) from 2023.9.2 to 2023.9.3.
- [Changelog](https://github.com/dask/dask/blob/main/docs/release-procedure.md)
- [Commits](dask/dask@2023.9.2...2023.9.3)

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

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

ci/test_requirements.txt

@@ -3,4 +3,4 @@ pytest==7.4.2
 pytest-mpl==0.16.1
 netCDF4==1.6.4
 coverage==7.3.1
-dask==2023.9.2
+dask==2023.9.3