gnome-pomodoro: 0.27.0 -> 0.28.0 (#445531)

pkgs/by-name/gn/gnome-pomodoro/package.nix

···
 }:
 stdenv.mkDerivation rec {
   pname = "gnome-pomodoro";
-  version = "0.27.0";
+  version = "0.28.0";
 
   src = fetchFromGitHub {
     owner = "gnome-pomodoro";
     repo = "gnome-pomodoro";
     rev = version;
-    hash = "sha256-ZdTMaCzjA7tsXmnlHGl8MFGGViVPwMZuiu91q5v/v9U=";
+    hash = "sha256-cVuBJ1Rwh/mjlFKKRJkKmdtDHdWNc6uiEE3ywCesirU=";
   };
 
   patches = [