Fixing Wording in Annotation Section

Author: vanou

jsonschema-core.xml

@@ -859,8 +859,8 @@
                     on behalf of applications.
                 </t>
                 <t>
-                    Unless otherwise specified, the value of an annotation keyword's
-                    annotation is the keyword's value.  However, other behaviors are possible.
+                    Unless otherwise specified, the value of an annotation keyword
+                    is the keyword's value.  However, other behaviors are possible.
                     For example, <xref target="json-hyper-schema">JSON Hyper-Schema's</xref>
                     "links" keyword is a complex annotation that produces a value based
                     in part on the instance data.