fix css class name

RuoYi

2022-01-23 4557ca0ace264f8097ac5af215103286d933f948

 ruoyi-ui/src/components/RuoYi/Doc/index.vue

@@ -1,6 +1,6 @@
<template>
  <div>
    <svg-icon icon-class="question" @click="goto"/>
    <svg-icon icon-class="question" @click="goto" />
  </div>
</template>