LibJS+LibWeb: Add missing visit calls in visit_edges implementations

Author: https://github.com/mattco98
Commit: 39d8c8d2a9
Pull-request: https://github.com/SerenityOS/serenity/pull/17979
Reviewed-by: https://github.com/awesomekling

Userland/Libraries/LibWeb/Bindings/Intrinsics.cpp

@@ -16,10 +16,13 @@ void Intrinsics::visit_edges(JS::Cell::Visitor& visitor)
 {
     Base::visit_edges(visitor);
 
+    for (auto& it : m_namespaces)
+        visitor.visit(it.value);
     for (auto& it : m_prototypes)
         visitor.visit(it.value);
     for (auto& it : m_constructors)
         visitor.visit(it.value);
+    visitor.visit(m_realm);
 }
 
 }