greybird: 3.22.6 -> 3.22.7

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

This update was made based on information from https://repology.org/metapackage/greybird/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.)
- directory tree listing: https://gist.github.com/49f269acfed0477087452f5f821f1b20

pkgs/misc/themes/greybird/default.nix

@@ -3,13 +3,13 @@
 stdenv.mkDerivation rec {
   name = "${pname}-${version}";
   pname = "greybird";
-  version = "3.22.6";
+  version = "3.22.7";
 
   src = fetchFromGitHub {
     owner = "shimmerproject";
     repo = "${pname}";
     rev = "v${version}";
-    sha256 = "16rifkyy8l4v03rx85j7m6rfdal99l1xdmghysh95r6lx4y6r01i";
+    sha256 = "118k0bb780h54i2vn5my5r6vbkk134899xwp4aigw5a289xzryvb";
   };
 
   nativeBuildInputs = [ autoreconfHook sass glib libxml2 gdk_pixbuf librsvg ];