修改 rich-text 示例

(cherry picked from commit 7f3bc165)

pages/component/rich-text/rich-text.uvue

@@ -14,9 +14,10 @@
       </view>
       <view class="uni-title">
         <text class="uni-subtitle-text">selectable</text>
+        <button type="default" @click="changeText">修改文本内容</button>
       </view>
       <view class="text-box">
-        <rich-text id="richtext" @click="changeText" style="border: 1px; border-style: solid; border-color: red;" :selectable="true"
+        <rich-text id="richtext" style="border: 1px; border-style: solid; border-color: red;" :selectable="true"
           :nodes="text"></rich-text>
       </view>
     </view>