JiaViii

For example, for a 5-shot model, how should I input support set and query set?

[CodeStyle][Xdoctest][37,41,44] Fix example code(`paddle.Tensor.unflatten`,`paddle.Tensor.view_as_complex`,`paddle.audio.datasets.ESC50`)

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### PR Category User Experience ### PR Types Others ### Description 为如下API修复示例代码 - paddle.Tensor.unflatten - paddle.Tensor.view_as_complex - paddle.audio.datasets.ESC50 ### Related links - 文档示例代码修复任务 #76545 cc @ooooo-create