Fix typo in org-attach.el

lisp/org-attach.el

@@ -53,7 +53,7 @@
 If this is a relative path, it will be interpreted relative to the directory
 where the Org file lives."
   :group 'org-attach
-  :type 'direcory)
+  :type 'directory)
 
 (defcustom org-attach-auto-tag "ATTACH"
   "Tag that will be triggered automatically when an entry has an attachment."