update questionAudio url prefix

src/modules/questions/directives/directives.js

@@ -17,7 +17,7 @@ function addAudio(el, binding, vnode) {
         .then(response => {
           if (response && response.data) {
             let audioFlag =
-              '<audio controls><source src="https://ecs-test-static.qmth.com.cn' +
+              '<audio controls><source src="' +
               response.data.fileUrl +
               '" type="audio/mpeg"></audio>';
             var b = document.createElement("span");