fix: emit will-navigate for sandboxed contents (#22188)

shell/renderer/electron_sandboxed_renderer_client.cc

@@ -291,4 +291,12 @@ void ElectronSandboxedRendererClient::WillReleaseScriptContext(
   InvokeHiddenCallback(context, kLifecycleKey, "onExit");
 }
 
+bool ElectronSandboxedRendererClient::ShouldFork(blink::WebLocalFrame* frame,
+                                                 const GURL& url,
+                                                 const std::string& http_method,
+                                                 bool is_initial_navigation,
+                                                 bool is_server_redirect) {
+  return true;
+}
+
 }  // namespace electron