Update kontakt.html

docs/en/kontakt.html

@@ -57,7 +57,7 @@
 	<li><a href="zapojenie.html">Wiring</a></li>      
 	<li><a href="json_client.html">JSON client</a></li>      
       	<li class="active"><a href="kontakt.html">Contact</a></li>
-<li><a href="../AR/index.html">AR</a></li>
+<li><a href="../QR/index.html">QR scanner</a></li>
 <a href="../kontakt.html"><img src="https://futbalovysen.sk/wp-content/uploads/slovakia.png" alt="Slovak flag.png, 2,2kB" title="Slovakia" height="32" width="32"></a>
 <a href="../fr/index.html"><img src="https://i.imgur.com/vX7NaZ7.png" alt="French.png, 2,2kB" title="French" height="32" width="32"></a> 
 <a href="../de/index.html"><img src="https://i.imgur.com/kY5DFH5.png" alt="German.png, 2,2kB" title="German" height="32" width="32"></a>