Try fixing docstrings

Author: dstansby

src/zarr/types.py

@@ -5,10 +5,10 @@
 from zarr.core.metadata.v3 import ArrayV3Metadata
 
 AnyArray: TypeAlias = Array[Any]
-AnyArray.__doc__ = "A Zarr format 2 or 3 `Array`"
+"""A Zarr format 2 or 3 `Array`"""
 
 ArrayV2: TypeAlias = Array[ArrayV2Metadata]
-ArrayV2.__doc__ = "A Zarr format 2 `Array`"
+"""A Zarr format 2 `Array`"""
 
 ArrayV3: TypeAlias = Array[ArrayV3Metadata]
-ArrayV3.__doc__ = "A Zarr format 3 `Array`"
+"""A Zarr format 3 `Array`"""