Fix typo

doc/drafts/README

@@ -9,7 +9,7 @@ or to cite them other than as "work in progress."
 
 OpenLDAP maintains copies of drafts for which we find interesting.
 It existance does not necessarily imply any support or any plans to
-support for the I-D.  The I-D found in this directory may be stale,
+support for the I-D.  The I-Ds found in this directory may be stale,
 expired, or otherwise out of date.
 
 Please refer to http://www.ietf.org/ for latest revisions (and