Bump zarr from 2.18.4 to 3.1.5

Bumps [zarr](https://github.com/zarr-developers/zarr-python) from 2.18.4 to 3.1.5.
- [Release notes](https://github.com/zarr-developers/zarr-python/releases)
- [Changelog](https://github.com/zarr-developers/zarr-python/blob/main/docs/release-notes.md)
- [Commits](zarr-developers/zarr-python@v2.18.4...v3.1.5)

---
updated-dependencies:
- dependency-name: zarr
  dependency-version: 3.1.5
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements.txt

@@ -8,7 +8,7 @@ requests==2.32.5
 statsmodels==0.14.6
 pytest==8.4.2
 pytest-cov==7.0.0
-zarr==2.18.4
+zarr==3.1.5
 ruff==0.8.6
 netcdf4==1.7.2
 h5netcdf==1.7.3