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/TextNode.h

@@ -16,6 +16,7 @@ class LineBoxFragment;
 
 class TextNode final : public Node {
     JS_CELL(TextNode, Node);
+    JS_DECLARE_ALLOCATOR(TextNode);
 
 public:
     TextNode(DOM::Document&, DOM::Text&);