Format file format from Windows/dos to Unix (#1949)

### What problem does this PR solve?

Related source file is in Windows/DOS format, they are format to Unix
format.

### Type of change

- [x] Refactoring

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

web/src/pages/404.jsx

@@ -1,16 +1,19 @@
-import { Button, Result } from 'antd';
-import { history } from 'umi';
-
-const NoFoundPage = () => {
-  return (<Result
-    status="404"
-    title="404"
-    subTitle="页面未找到，请输入正确的地址。"
-    extra={< Button type="primary" onClick={() => history.push('/')}>
-      返回主页
-    </Button>}
-  />
-  )
-};
-
-export default NoFoundPage;
+import { Button, Result } from 'antd';
+import { history } from 'umi';
+
+const NoFoundPage = () => {
+  return (
+    <Result
+      status="404"
+      title="404"
+      subTitle="页面未找到，请输入正确的地址。"
+      extra={
+        <Button type="primary" onClick={() => history.push('/')}>
+          返回主页
+        </Button>
+      }
+    />
+  );
+};
+
+export default NoFoundPage;