python3Packages.plyer: Adopt by NGI team

Current maintainer said that they have no reason to maintain this anymore.

pkgs/development/python-modules/plyer/default.nix

···
     description = "Plyer is a platform-independent api to use features commonly found on various platforms";
     homepage = "https://github.com/kivy/plyer";
     license = licenses.mit;
-    maintainers = with maintainers; [ rski ];
+    teams = [
+      lib.teams.ngi
+    ];
   };
 }