Fix qwen2_5_xnnpack_q8da4w.yaml

[jackzhxng]

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[cccclai]

For llama, we use

quantization:
  qmode: 8da4w
  group_size: 128
  embedding_quantize: 4,32

Is 8da4w good enough for accuracy?

[jackzhxng]

Yeah we can do that as well. Caveat though that I remember the 0.5B version not reacting well to embedding quantization

[cccclai]

Ah yeah we don't want embedding to quantize for sure. But I think we need group wise quantization. If we just do qmode: 8da4w, is it using group wise quantization with a default group size?

[jackzhxng]

Yeah, 128 would be the default group size

[cccclai]

Makes sense. Thanks!