LibWeb: Add a few missing visits to m_rel_list members

Author: https://github.com/mattco98
Commit: 74aeb57631
Pull-request: https://github.com/SerenityOS/serenity/pull/24350
Reviewed-by: https://github.com/ADKaster ✅

Userland/Libraries/LibWeb/HTML/HTMLAreaElement.h

@@ -26,6 +26,7 @@ private:
     HTMLAreaElement(DOM::Document&, DOM::QualifiedName);
 
     virtual void initialize(JS::Realm&) override;
+    virtual void visit_edges(Cell::Visitor&) override;
 
     // ^DOM::Element
     virtual void attribute_changed(FlyString const& name, Optional<String> const& value) override;