libnftnl: 1.2.5 -> 1.2.6

https://lwn.net/Articles/937936/

pkgs/development/libraries/libnftnl/default.nix

···
 { lib, stdenv, fetchurl, pkg-config, libmnl }:
 
 stdenv.mkDerivation rec {
-  version = "1.2.5";
+  version = "1.2.6";
   pname = "libnftnl";
 
   src = fetchurl {
     url = "https://netfilter.org/projects/${pname}/files/${pname}-${version}.tar.xz";
-    hash = "sha256-lm3gqBIMilPbhZiJdJNov7LLoMTwtMGjDSZOzMRfEiY=";
+    hash = "sha256-zurqLNkhR9oZ8To1p/GkvCdn/4l+g45LR5z1S1nHd/Q=";
   };
 
   nativeBuildInputs = [ pkg-config ];