Update static/index.html

static/index.html

@@ -115,7 +115,7 @@
                 statusDiv.className = 'connected';
                 addLog('Connexion WebSocket établie.');
             };
-            ws.onmessage = function(event) {
+            ws.onmessage = async function(event) {
                 const messageFromServer = event.data;
                 addLog(`Message reçu du serveur : "${messageFromServer}"`);