fixup

src/zarr/codecs/crc32c_.py

@@ -53,7 +53,7 @@ async def _encode_single(
     ) -> Buffer | None:
         data = chunk_bytes.as_numpy_array()
         # Calculate the checksum and "cast" it to a numpy array
-        checksum = np.array([crc32c(data)], dtype=np.uint32)  # type: ignore[arg-type]
+        checksum = np.array([crc32c(cast(typing_extensions.Buffer, data))], dtype=np.uint32)
         # Append the checksum (as bytes) to the data
         return chunk_spec.prototype.buffer.from_array_like(np.append(data, checksum.view("b")))