LibWeb: Port Intrinsics from DeprecatedString

Author: https://github.com/shannonbooth
Commit: 96af80acd1
Pull-request: https://github.com/SerenityOS/serenity/pull/22057
Reviewed-by: https://github.com/trflynn89

Userland/Libraries/LibWeb/HTML/HTMLSourceElement.cpp

@@ -23,7 +23,7 @@ HTMLSourceElement::~HTMLSourceElement() = default;
 void HTMLSourceElement::initialize(JS::Realm& realm)
 {
     Base::initialize(realm);
-    set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLSourceElementPrototype>(realm, "HTMLSourceElement"));
+    set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLSourceElementPrototype>(realm, "HTMLSourceElement"_fly_string));
 }
 
 // https://html.spec.whatwg.org/multipage/embedded-content.html#the-source-element:the-source-element-15