［修改］昵称改为学号

src/views/login/Register.vue

@@ -5,13 +5,13 @@
       {{ errorMassage }}
     </b-notification>
     <b-field
-      label="昵称"
+      label="学号"
       :type="$v.nickname.$error ? 'is-danger' : ''"
       :message="$v.nickname.$error ? '昵称须由长度为4至16的字母或数字组成' : ''"
     >
       <b-input
         v-model="$v.nickname.$model"
-        placeholder="在此输入昵称"
+        placeholder="在此输入学号"
       ></b-input>
     </b-field>
     <b-field