会员升级页面，文字修改

frontendEle/src/views/user/upgrade.vue

@@ -45,7 +45,7 @@
                         </el-option>
                     </el-select>
                 </el-form-item>
-                <el-form-item v-if="!isMax" label="Payment"><!-- 升级补差业绩 -->
+                <el-form-item v-if="!isMax" label="Top Up(BV)"><!-- 升级补差业绩 -->
                     <el-input v-model="needDiffPv"
                     disabled
                     >