Update showcase

Author: knolleary

index.html

@@ -166,6 +166,7 @@ <h3>Who's using Node-RED?</h3>
                 <li><a href="https://www.iaconnects.co.uk/"><img src="users/iaconnects.png"/></a></li>
                 <li><a href="https://www.flowfuse.com/"><img src="users/flowfuse.svg"/></a></li>
                 <li><a href="https://www.qbee.io/"><img src="users/qbee.png.webp"/></a></li>
+                <li><a href="https://www.charge-unix.fr/"><img src="users/charge_unix.png"/></a></li>
             </ul>
             <p style="text-align:center;"><a href="/about/community/">Want to feature here? Let us know!</a></p>
             <p style="text-align:center; font-size: 0.6em; max-width: 420px; line-height: 1.2em; margin: auto; ">All logos used with permission. These links do not constitute an endorsement or approval by the Node-RED project of any of the products, services or opinions of the companies listed.</p>