fix some wording

Author: kriszyp

draft-zyp-json-schema-03.xml

@@ -534,7 +534,7 @@ This indicates the target of the link is the schema for the instance object. Thi
 <t hangText="root">This relation indicates that the target of the link
 SHOULD be treated as the root or the body of the representation for the
 purposes of user agent interaction or fragment resolution. All other
-properties of the instance objects are can be regarded as meta-data
+properties of the instance objects can be regarded as meta-data
 descriptions for the data.
 </t>
 </list>