Fix config and import order

Author: sserrata

demo/docusaurus.config.ts

@@ -9,9 +9,7 @@ import { myCustomApiMdGenerator } from "./customMdGenerators";
 const config: Config = {
   future: {
     experimental_faster: (process.env.DOCUSAURUS_FASTER ?? "true") === "true",
-    v4: {
-      removeLegacyPostBuildHeadAttribute: true,
-    },
+    v4: true,
   },
 
   title: "Docusaurus OpenAPI Docs",

packages/docusaurus-theme-openapi-docs/src/theme/ApiExplorer/ApiCodeBlock/CopyButton/index.tsx

@@ -6,6 +6,7 @@
  * ========================================================================== */
 
 import React, { useCallback, useState, useRef, useEffect } from "react";
+
 import { translate } from "@docusaurus/Translate";
 import clsx from "clsx";
 import copy from "copy-text-to-clipboard";