fix: demo优化

src/packages/__VUE/cascader/demo.vue

@@ -40,7 +40,7 @@
           :title="translate('addressTip')"
           v-model:visible="demo2.visible"
           v-model="demo2.value"
-          label-key="text"
+          text-key="text"
           @change="events.change"
           @path-change="events.pathChange"
           value-key="text"

src/packages/__VUE/cascader/doc.en-US.md

@@ -139,7 +139,7 @@ use `textKey`、`valueKey`、`childrenKey`Specify the property name.
       title="Select address"
       v-model:visible="state.visible"
       v-model="state.value"
-      label-key="text"
+      text-key="text"
       @change="events.change"
       @path-change="events.pathChange"
       value-key="text"

src/packages/__VUE/cascader/doc.md

@@ -139,7 +139,7 @@ export default {
       title="地址选择"
       v-model:visible="state.visible"
       v-model="state.value"
-      label-key="text"
+      text-key="text"
       @change="events.change"
       @path-change="events.pathChange"
       value-key="text"