update wasm/vad-asr/assets/README.md for more clear (#2297)

Co-authored-by: gxy <gxy@conwi.cn>

@@ -18,6 +18,20 @@ Please refer to
 https://k2-fsa.github.io/sherpa/onnx/lazarus/generate-subtitles.html#download-a-speech-recognition-model
 for how to rename.
 
+The renamed file shoud put in current folder( ```/<repo>/wasm/vad-asr/assets```)
+Example after download sense-voice model
+```
+tree ~/work/github/sherpa-onnx/wasm/vad-asr/assets
+/home/gxy/work/github/sherpa-onnx/wasm/vad-asr/assets
+├── README.md
+├── sense-voice.onnx
+├── silero_vad.onnx
+└── tokens.txt
+
+1 directory, 4 files
+```
+
+
 You can find example build scripts at the following address:
 
   https://github.com/k2-fsa/sherpa-onnx/blob/master/.github/workflows/wasm-simd-hf-space-vad-asr.yaml