Update index.html

Author: Yndira-E

index.html

@@ -12,7 +12,7 @@
     <meta property="og:description" content="Node-RED Con is our conference that brings the community together to hear all the latest news about the project, inspiring stories about how Node-RED is used to solve real problems, and lots more." />
     <meta name="twitter:title" content="Node-RED Con 2025 - November 4, 2025">
     <meta name="twitter:description" content="Node-RED Con is our conference that brings the community together to hear all the latest news about the project, inspiring stories about how Node-RED is used to solve real problems, and lots more.">
-    <meta name="twitter:image" content="https://nrcon.nodered.org/images/nrcon.png?v=2025">
+    <meta name="twitter:image" content="https://nrcon.nodered.org/images/nrcon-x.png">
     <meta name="twitter:card" content="summary_large_image">
     <link rel="icon" href="favicon.ico">
     <title>Node-RED Con</title>