freewheeling: 0.6.2 -> 0.6.4

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/freewheeling/versions.

These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 0.6.4 with grep in /nix/store/qghkfd9jdwr48g1jjgxrmih3465z2zs8-freewheeling-0.6.4
- directory tree listing: https://gist.github.com/8096c1ffb038059894be62a355461c42

pkgs/applications/audio/freewheeling/default.nix

@@ -8,13 +8,13 @@ in
 
 stdenv.mkDerivation rec {
   name = "freewheeling-${version}";
-  version = "0.6.2";
+  version = "0.6.4";
 
   src = fetchFromGitHub {
     owner = "free-wheeling";
     repo = "freewheeling";
     rev = "v${version}";
-    sha256 = "01hmp0jxzxpb5sl0x91hdlwmbw9n4yffrpra4f89s4n8cixrz3d9";
+    sha256 = "1xflbbnjdibjmyxb1zq8liylaw5k03nnl1z3272jh204pqh17ri9";
   };
 
   nativeBuildInputs = [ pkgconfig autoreconfHook libtool ];