LibJS: Add missing Base::visit_edges() in FetchAlgorithms and Navigable

These are empty calls since `Base` is JS::Cell  but they *are* missing
and LibJSGCVerifier complains otherwise.

Userland/Libraries/LibWeb/Fetch/Infrastructure/FetchAlgorithms.cpp

@@ -47,6 +47,7 @@ FetchAlgorithms::FetchAlgorithms(
 
 void FetchAlgorithms::visit_edges(JS::Cell::Visitor& visitor)
 {
+    Base::visit_edges(visitor);
     visitor.visit(m_process_request_body_chunk_length);
     visitor.visit(m_process_request_end_of_body);
     visitor.visit(m_process_early_hints_response);

Userland/Libraries/LibWeb/HTML/Navigable.cpp

@@ -57,6 +57,7 @@ public:
 
     virtual void visit_edges(Cell::Visitor& visitor) override
     {
+        Base::visit_edges(visitor);
         visitor.visit(m_response);
     }