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/ErrorEvent.cpp

@@ -36,7 +36,7 @@ ErrorEvent::~ErrorEvent() = default;
 void ErrorEvent::initialize(JS::Realm& realm)
 {
     Base::initialize(realm);
-    set_prototype(&Bindings::ensure_web_prototype<Bindings::ErrorEventPrototype>(realm, "ErrorEvent"));
+    set_prototype(&Bindings::ensure_web_prototype<Bindings::ErrorEventPrototype>(realm, "ErrorEvent"_fly_string));
 }
 
 void ErrorEvent::visit_edges(Cell::Visitor& visitor)