loosen dtype restriction

Author: TomAugspurger

src/zarr/core/buffer/gpu.py

@@ -59,7 +59,7 @@ def __init__(self, array_like: ArrayLike) -> None:
 
         if array_like.ndim != 1:
             raise ValueError("array_like: only 1-dim allowed")
-        if array_like.dtype != np.dtype("B"):
+        if array_like.dtype.itemsize != 1:
             raise ValueError("array_like: only byte dtype allowed")
 
         if not hasattr(array_like, "__cuda_array_interface__"):