fix about and port it to Adw.AboutDialog

src/main.py

@@ -49,16 +49,16 @@ class EepmPlayGuiApplication(Adw.Application):
 
     def on_about_action(self, widget, _):
         """Callback for the app.about action."""
-        about = Adw.AboutWindow(transient_for=self.props.active_window,
-                                application_name='eepm-play-gui',
+        about = Adw.AboutDialog(application_name='eepm-play-gui',
                                 application_icon='ru.eepm.PlayGUI',
                                 developer_name='Etersoft',
                                 version='0.2.0',
                                 developers=['Ximper', "Vladimir Vaskov <rirusha@altlinux.org>"],
-                                artists=['Ximper', "Vladimir Vaskov <rirusha@altlinux.org>"],
+                                designers=['Ximper', "Vladimir Vaskov <rirusha@altlinux.org>"],
+                                artists=['Ximper'],
                                 license_type=Gtk.License.AGPL_3_0,
                                 copyright='© 2024 Etersoft')
-        about.present()
+        about.present(self.props.active_window)
 
     def create_action(self, name, callback, shortcuts=None):
         """Add an application action.