libsecret: 0.18 -> 0.18.5

pkgs/development/libraries/libsecret/default.nix

···
 { stdenv, fetchurl, glib, pkgconfig, intltool, libxslt, docbook_xsl, gtk_doc
 , libgcrypt, gobjectIntrospection }:
 let
-  version = "0.18";
+  version = "0.18.5";
 in
 stdenv.mkDerivation rec {
   name = "libsecret-${version}";
 
   src = fetchurl {
-    url = "mirror://gnome/sources/libsecret/${version}/${name}.tar.xz";
-    sha256 = "1qq29c01xxjyx5sl6y5h22w8r0ff4c73bph3gfx3h7mx5mvalwqc";
+    url = "mirror://gnome/sources/libsecret/0.18/${name}.tar.xz";
+    sha256 = "1cychxc3ff8fp857iikw0n2s13s2mhw2dn1mr632f7w3sn6vvrww";
   };
 
   propagatedBuildInputs = [ glib ];