Update README.md for KWS to not use git lfs. (#1729)

Author: csukuangfj

wasm/kws/assets/README.md

@@ -7,21 +7,34 @@ to download a model.
 # Kws
 
 The following is an example:
-```
-cd sherpa-onnx/wasm/kws
-git clone https://www.modelscope.cn/pkufool/sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01.git assets
+```bash
+cd sherpa-onnx/wasm/kws/assets
+wget https://github.com/k2-fsa/sherpa-onnx/releases/download/kws-models/sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01.tar.bz2
+tar xvf sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01.tar.bz2
+rm sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01.tar.bz2
+
+mv sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/encoder-epoch-12-avg-2-chunk-16-left-64.onnx ./
+mv sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/decoder-epoch-12-avg-2-chunk-16-left-64.onnx ./
+mv sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/joiner-epoch-12-avg-2-chunk-16-left-64.onnx ./
+mv sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/tokens.txt ./
+rm -rf sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01
 ```
 
 You should have the following files in `assets` before you can run
 `build-wasm-simd-kws.sh`
 
-```
-├── decoder-epoch-12-avg-2-chunk-16-left-64.onnx
-├── encoder-epoch-12-avg-2-chunk-16-left-64.onnx
-├── joiner-epoch-12-avg-2-chunk-16-left-64.onnx
-├── keywords_raw.txt
-├── keywords.txt
-├── README.md
-└── tokens.txt
+```bash
+fangjuns-MacBook-Pro:assets fangjun$ pwd
+/Users/fangjun/open-source/sherpa-onnx/wasm/kws/assets
 
+fangjuns-MacBook-Pro:assets fangjun$ ls -lh
+total 25616
+-rw-r--r--  1 fangjun  staff   692B Oct 29 16:53 README.md
+-rw-r--r--  1 fangjun  staff   660K Aug 14 15:21 decoder-epoch-12-avg-2-chunk-16-left-64.onnx
+-rw-r--r--  1 fangjun  staff    12M Aug 14 15:21 encoder-epoch-12-avg-2-chunk-16-left-64.onnx
+-rw-r--r--  1 fangjun  staff   247K Aug 14 15:21 joiner-epoch-12-avg-2-chunk-16-left-64.onnx
+-rw-r--r--  1 fangjun  staff   1.6K Aug 14 15:08 tokens.txt
 ```
+
+**Hint**: Remember to remove extra files from ``assets``. For instance, please remember to remove
+the file `sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01.tar.bz2`.