update demo, readme

shixian.shi

2024-01-16 b7cb19b01a1454f7a1388e24dcd4e10fc654bd7c

 runtime/onnxruntime/src/fsmn-vad.cpp

@@ -264,6 +264,7 @@
                p.insert(p.end(), vad_feats[vad_feats.size() - 1].begin(), vad_feats[vad_feats.size() - 1].end());
            }
            out_feats.emplace_back(p);
            p.clear();
        }
    }
    // Apply cmvn