LibWeb: Visit Animatable::m_associated_effects

Author: https://github.com/mattco98
Commit: 24ec5838ba
Pull-request: https://github.com/SerenityOS/serenity/pull/23523

Userland/Libraries/LibWeb/DOM/Element.cpp

@@ -91,6 +91,7 @@ void Element::visit_edges(Cell::Visitor& visitor)
 {
     Base::visit_edges(visitor);
     SlottableMixin::visit_edges(visitor);
+    Animatable::visit_edges(visitor);
 
     visitor.visit(m_attributes);
     visitor.visit(m_inline_style);