Re-enable docusaurus faster (#19593)

website/docusaurus.config.js

@@ -286,15 +286,9 @@ const config = {
   },
 
   future: {
-    faster: {
-      swcJsLoader: true,
-      swcHtmlMinimizer: true,
-      lightningCssMinimizer: true,
-      mdxCrossCompilerCache: true,
-
-      // https://github.com/facebook/docusaurus/issues/11047
-      swcJsMinimizer: false,
-      rspackBundler: false,
+    v4: {
+      removeLegacyPostBuildHeadAttribute: true,
+      fasterByDefault: true,
     },
   },
 };