fix say task again

lib/tasks/cognigy/index.js

@@ -259,7 +259,7 @@ class Cognigy extends Task {
   
       await this._enqueueTask((async() => {
          this.logger.info({text}, "received text");
-          const sayTask =  this._makeSayTask(text).exec();
+          const sayTask = this._makeSayTask(text);
           await sayTask.exec(cs, ep, this);
       }).bind(this));
     }