ulauncher: 5.15.4 -> 5.15.6

pkgs/applications/misc/ulauncher/default.nix

···
 
 python3Packages.buildPythonApplication rec {
   pname = "ulauncher";
-  version = "5.15.4";
+  version = "5.15.6";
 
   src = fetchurl {
     url = "https://github.com/Ulauncher/Ulauncher/releases/download/${version}/ulauncher_${version}.tar.gz";
-    sha256 = "sha256-5pEpYnJFHQKEfTve07ngFVDAOM9+kwrx6hc30gEwsko=";
+    sha256 = "sha256-WOWDekh9rcXeiN/ejiYC4BELhJwd98GkmyDOLN26ayU=";
   };
 
   nativeBuildInputs = with python3Packages; [