fix(luks); Passthrough filesystems of content for unmounting

Author: Bert-Proesmans

lib/types/luks.nix

@@ -214,6 +214,7 @@ in
               cryptsetup close "${config.name}"
             fi
           '';
+          fs = lib.optionalAttrs (config.content != null) contentUnmount.fs or { };
         };
     };
     _config = lib.mkOption {