chore: make phased pipeline the default

Author: d-v-b

src/zarr/core/config.py

@@ -104,7 +104,7 @@ def enable_gpu(self) -> ConfigSet:
             "threading": {"max_workers": None},
             "json_indent": 2,
             "codec_pipeline": {
-                "path": "zarr.core.codec_pipeline.BatchedCodecPipeline",
+                "path": "zarr.core.codec_pipeline.PhasedCodecPipeline",
                 "batch_size": 1,
             },
             "codecs": {