Fix api of 1.22

src/pages/api/1.22/index.js

@@ -0,0 +1,8 @@
+import React from 'react';
+import ClientOnly from '@site/src/components/ClientOnly';
+
+export default function Api21() {
+  return (
+    <ClientOnly swaggerPath="/swagger-22.json"/>
+  );
+}