change whatsnew url

src/app.h

@@ -262,7 +262,7 @@ public:
     void dialog_ppbr_export();
     void dialog_export_mp4();
     void dialog_timelapse_export();
-    void dialog_whatsnew();
+    void dialog_whatsnew(bool force_show);
 
     void cloud_upload();
     void cloud_upload_all();