Bump dask from 2024.1.0 to 2024.3.0 in /.github/dependabot

Bumps [dask](https://github.com/dask/dask) from 2024.1.0 to 2024.3.0.
- [Changelog](https://github.com/dask/dask/blob/main/docs/release-procedure.md)
- [Commits](dask/dask@2024.1.0...2024.3.0)

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

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

.github/dependabot/constraints.txt

@@ -1,5 +1,5 @@
 cftime==1.6.3
-dask==2024.1.0
+dask==2024.3.0
 h5netcdf==1.3.0
 hurry.filesize==0.9
 netCDF4==1.6.5