feat: connect new help button help-pages/instance-copy

Signed-off-by: Rachel Powers <508861+Ryex@users.noreply.github.com>

launcher/ui/dialogs/CopyInstanceDialog.h

@@ -42,6 +42,9 @@ public:
     QString iconKey() const;
     const InstanceCopyPrefs& getChosenOptions() const;
 
+public slots:
+    void help();
+
 private
 slots:
     void on_iconButton_clicked();