Bump zarr from 3.0.6 to 3.0.8 (#35)

Bumps [zarr](https://github.com/zarr-developers/zarr-python) from 3.0.6 to 3.0.8.
- [Release notes](https://github.com/zarr-developers/zarr-python/releases)
- [Changelog](https://github.com/zarr-developers/zarr-python/blob/v3.0.8/docs/release-notes.rst)
- [Commits](zarr-developers/zarr-python@v3.0.6...v3.0.8)

Author: weiji14