fix h5 for timestamp change (#880)

zhaomingwork

2023-08-21 ca0ada5915b4c71fc4a30db689e0e3646181aebf

 funasr/runtime/websocket/websocket-server.cpp

@@ -83,6 +83,7 @@
      nlohmann::json jsonresult;        // result json

      jsonresult["text"] = asr_result;  // put result in 'text'

      jsonresult["mode"] = "offline";

     jsonresult["is_final"] = false;

      if(stamp_res != ""){

        jsonresult["timestamp"] = stamp_res;

      }