libwnck: 43.2 -> 43.3

pkgs/development/libraries/libwnck/default.nix

···
 
 stdenv.mkDerivation rec {
   pname = "libwnck";
-  version = "43.2";
+  version = "43.3";
 
   outputs = [
     "out"
···
 
   src = fetchurl {
     url = "mirror://gnome/sources/libwnck/${lib.versions.major version}/libwnck-${version}.tar.xz";
-    sha256 = "VadETsH7uVwIbUCWc4jyMbXAu8jP+qCGv5KQrkSeUdU=";
+    sha256 = "avisQajwZ63h08qu0lSoNCO19hrT96Rg/Ky6wuGSvfc=";
   };
 
   nativeBuildInputs = [