docs: fix tooltip doc error (#14748)

examples/docs/en-US/tooltip.md

@@ -143,6 +143,16 @@ In fact, Tooltip is an extension based on [Vue-popper](https://github.com/elemen
   </el-tooltip>
 </template>
 
+<script>
+  export default {
+    data() {
+      return {
+        disabled: false
+      };
+    }
+  };
+</script>
+
 <style>
   .slide-fade-enter-active {
     transition: all .3s ease;

examples/docs/es/tooltip.md

@@ -143,6 +143,16 @@ De hecho, Tooltip es una extension basada en [Vue-popper](https://github.com/ele
   </el-tooltip>
 </template>
 
+<script>
+  export default {
+    data() {
+      return {
+        disabled: false
+      };
+    }
+  };
+</script>
+
 <style>
   .slide-fade-enter-active {
     transition: all .3s ease;

examples/docs/fr-FR/tooltip.md

@@ -143,6 +143,16 @@ En réalité, Tooltip est une extension de [Vue-popper](https://github.com/eleme
   </el-tooltip>
 </template>
 
+<script>
+  export default {
+    data() {
+      return {
+        disabled: false
+      };
+    }
+  };
+</script>
+
 <style>
   .slide-fade-enter-active {
     transition: all .3s ease;

examples/docs/zh-CN/tooltip.md

@@ -139,6 +139,15 @@ Tooltip 组件提供了两个不同的主题：`dark`和`light`。
     <el-button @click="disabled = !disabled">点击{{disabled ? '开启' : '关闭'}} tooltip 功能</el-button>
   </el-tooltip>
 </template>
+<script>
+  export default {
+    data() {
+      return {
+        disabled: false
+      };
+    }
+  };
+</script>
 ```
 :::