Update index.html

update the IETF link to point to RFC 7519 and up the jose4j version to 0.4.2

Author: b---c

html/index.html

@@ -78,7 +78,7 @@
     <div class="banner-jwt">
       <canvas></canvas>
       <div class="container">
-        <p><strong>JSON Web Token (JWT)</strong> is a compact URL-safe means of representing claims to be transferred between two parties. The claims in a JWT are encoded as a JSON object that is digitally signed using JSON Web Signature (JWS). <a href="http://tools.ietf.org/html/draft-ietf-oauth-json-web-token" target="_blank">IETF</a></p>
+        <p><strong>JSON Web Token (JWT)</strong> is a compact URL-safe means of representing claims to be transferred between two parties. The claims in a JWT are encoded as a JSON object that is digitally signed using JSON Web Signature (JWS). <a href="http://tools.ietf.org/html/rfc7519" target="_blank">IETF</a></p>
 
 
 
@@ -386,7 +386,7 @@ <h3 class="panel-title">Java</h3>
             </div>
 
             <div class="panel-footer">
-                <code>maven: org.bitbucket.b_c / jose4j / 0.4.0</code>
+                <code>maven: org.bitbucket.b_c / jose4j / 0.4.2</code>
             </div>
           </div>
         </div>