Fix error in older changelog

While we were at one point going to use "uri-ref", by the time
we actually published draft-wright-json-schema-validation-01
we had decided on "uri-reference".

Author: handrews

jsonschema-validation.xml

@@ -1505,7 +1505,7 @@
                     </t>
                     <t hangText="draft-wright-json-schema-validation-01">
                         <list style="symbols">
-                            <t>Standardized on hyphenated format names ("uriref" becomes "uri-ref")</t>
+                            <t>Standardized on hyphenated format names with full words ("uriref" becomes "uri-reference")</t>
                             <t>Add the formats "uri-template" and "json-pointer"</t>
                             <t>Changed "exclusiveMaximum"/"exclusiveMinimum" from boolean modifiers of "maximum"/"minimum" to independent numeric fields.</t>
                             <t>Split the additionalItems/items into two sections</t>