LibWeb: Add calls to JS_{DECLARE,DEFINE}_ALLOCATOR()

Author: https://github.com/mattco98
Commit: 31341b280a
Pull-request: https://github.com/SerenityOS/serenity/pull/23878
Issue: https://github.com/SerenityOS/serenity/issues/23805
Reviewed-by: https://github.com/awesomekling

Userland/Libraries/LibWeb/Layout/AudioBox.h

@@ -14,6 +14,7 @@ namespace Web::Layout {
 
 class AudioBox final : public ReplacedBox {
     JS_CELL(AudioBox, ReplacedBox);
+    JS_DECLARE_ALLOCATOR(AudioBox);
 
 public:
     HTML::HTMLAudioElement& dom_node();