editorial: update JSON-LD reference, for #403

Author: rhiaro

Diff for: index.html

@@ -2532,7 +2532,7 @@ <h2>
       </h2>
 
       <p>
-[[!JSON-LD]] is a JSON-based format used to serialize
+[[!JSON-LD11]] is a JSON-based format used to serialize
 <a href="http://www.w3.org/TR/ld-glossary/#linked-data">Linked Data</a>.
       </p>