docs: align async codec parameter docs

Author: mgalore

src/zarr/core/array.py

@@ -4632,7 +4632,11 @@ async def create_array(
         filters are applied (if any are specified) and the data is serialized into bytes.
 
         For Zarr format 3, a "compressor" is a codec that takes a bytestream, and
-        returns another bytestream. Multiple compressors may be provided for Zarr format 3.
+        returns another bytestream. These values must be instances of
+        [`zarr.abc.codec.BytesBytesCodec`][], or dict representations of
+        [`zarr.abc.codec.BytesBytesCodec`][]. Multiple compressors may be provided
+        for Zarr format 3. Codecs that take an array and return bytes are serializers
+        and must be supplied with ``serializer`` instead.
         If no ``compressors`` are provided, a default set of compressors will be used.
         These defaults can be changed by modifying the value of ``array.v3_default_compressors``
         in [`zarr.config`][zarr.config].
@@ -4646,6 +4650,8 @@ async def create_array(
     serializer : dict[str, JSON] | ArrayBytesCodec, optional
         Array-to-bytes codec to use for encoding the array data.
         Zarr format 3 only. Zarr format 2 arrays use implicit array-to-bytes conversion.
+        Codecs that are instances of [`zarr.abc.codec.ArrayBytesCodec`][] must be
+        supplied here, not with ``compressors``.
         If no ``serializer`` is provided, a default serializer will be used.
         These defaults can be changed by modifying the value of ``array.v3_default_serializer``
         in [`zarr.config`][zarr.config].