Added change log comment

Author: kriszyp

draft-zyp-json-schema-03.xml

@@ -926,6 +926,7 @@ instead of numbers</t>
               <t>Defined referencing schemas by URI for all elements that accept schemas</t>
               <t>Added example and verbiage to extends</t>
               <t>Defined slash-delimited to use a leading slash</t>
+              <t>Made "root" a relation instead of an attribute</t>
               <t>Removed address values, and mime media type from format to reduce confusion (mediaType already exists, so it can be used for MIME types)</t>
               <t>Added more explanation of nullability.</t>
               <t>Removed "alternate" attribute.</t>