Fix id

The id `link-impl-json-schema` appeared twice.

Author: domoritz

implementations.html

@@ -142,7 +142,7 @@ <h2>Schema generation</h2>
 	</li>
 	<li>TypeScript
 	<ul>
-		<li><a id="link-impl-json-schema" href="https://github.com/YousefED/typescript-json-schema">typescript-json-schema</a></li>
+		<li><a id="link-impl-typescript-json-schema" href="https://github.com/YousefED/typescript-json-schema">typescript-json-schema</a></li>
 		<li><a id="link-impl-typson" href="https://github.com/lbovet/typson">Typson</a> (Apache 2.0)</li>
 	</ul>
 	</li>