Add quotes back

Author: Relequestual

jsonschema-validation.xml

@@ -1047,9 +1047,9 @@
                     the entire resource being described MAY be removed in the future.
                 </t>
                 <t>
-                    When the deprecated keyword is applied to an item in an array by means of 
-                    items, if items is a single schema, the deprecation relates to the whole 
-                    array, while if items is an array of schemas, the deprecation relates to 
+                    When the "deprecated" keyword is applied to an item in an array by means of 
+                    "items", if "items" is a single schema, the deprecation relates to the whole 
+                    array, while if "items" is an array of schemas, the deprecation relates to 
                     the corrosponding item according to the subschemas position.
                 </t>
                 <t>