Update zarr requirement in the pip-dependencies group

Updates the requirements on [zarr](https://github.com/zarr-developers/zarr-python) to permit the latest version.

Updates `zarr` to 3.0.2
- [Release notes](https://github.com/zarr-developers/zarr-python/releases)
- [Changelog](https://github.com/zarr-developers/zarr-python/blob/main/docs/release-notes.rst)
- [Commits](zarr-developers/zarr-python@v2.12.0...v3.0.2)

---
updated-dependencies:
- dependency-name: zarr
  dependency-type: direct:production
  dependency-group: pip-dependencies
...

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

pyproject.toml

@@ -62,11 +62,11 @@ kerchunk = [
   "h5py >=3.6.0",
   "h5netcdf",
   "xarray",
-  "zarr >=2.12.0, <3.0.0a",
+  "zarr >=2.12.0, <4.0.0",
 ]
 virtualizarr = [
   "numpy >=1.26.4",
-  "zarr >=2.12.0, <3.0.0a",
+  "zarr >=2.12.0, <4.0.0",
   "virtualizarr >=1.2.0",
   "dask",
   "h5py >=3.6.0",
@@ -79,7 +79,7 @@ dev = [
   "uv >=0.4.7",
 ]
 test = [
-  "zarr >=2.12.0, <3.0.0a",
+  "zarr >=2.12.0, <4.0.0",
   "numpy >=1.26.4",
   "mypy >=1.11.2",
   "pytest >=8.3",