[Fix] Powerpaint to load safetensors

[sdbds]

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Motivation

huggingface delete .bin instead of .safetensors,so i fix to load safetensors

Modification

fix to load safetensors

BC-breaking (Optional)

None

Use cases (Optional)

None

Checklist

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:white_check_mark: zengyh1900
:x: sdbds
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[sdbds]

@zengyh1900 simple fix