LibWeb: Use Element::id() when deciding whether to update SVG use trees

Userland/Libraries/LibWeb/SVG/SVGElement.cpp

@@ -61,7 +61,7 @@ void SVGElement::update_use_elements_that_reference_this()
         // If this element is in a shadow root, it already represents a clone and is not itself referenced.
         || is<DOM::ShadowRoot>(this->root())
         // If this does not have an id it cannot be referenced, no point in searching the entire DOM tree.
-        || !this->has_attribute(HTML::AttributeNames::id)
+        || !id().has_value()
         // An unconnected node cannot have valid references.
         // This also prevents searches for elements that are in the process of being constructed - as clones.
         || !this->is_connected()
@@ -87,7 +87,7 @@ void SVGElement::removed_from(Node* parent)
 
 void SVGElement::remove_from_use_element_that_reference_this()
 {
-    if (is<SVGUseElement>(this) || !this->has_attribute(HTML::AttributeNames::id)) {
+    if (is<SVGUseElement>(this) || !id().has_value()) {
         return;
     }