Fix select demo

components/select/__tests__/__snapshots__/demo.test.js.snap

@@ -848,6 +848,13 @@ exports[`renders ./components/select/demo/tags.md correctly 1`] = `
     <div
       class="ant-select-selection__rendered"
     >
+      <div
+        class="ant-select-selection__placeholder"
+        style="display:block;user-select:none;-webkit-user-select:none;"
+        unselectable="unselectable"
+      >
+        标签模式
+      </div>
       <ul>
         <li
           class="ant-select-search ant-select-search--inline"

components/select/demo/tags.md

@@ -30,7 +30,7 @@ ReactDOM.render(
   <Select
     mode="tags"
     style={{ width: '100%' }}
-    searchPlaceholder="标签模式"
+    placeholder="标签模式"
     onChange={handleChange}
   >
     {children}