Fix link

Author: microbit-matt-hillsdon

index.html

@@ -24,7 +24,7 @@
     />
     <meta property="og:image" content="%VITE_FULL_URL%social.jpg" />
 
-    <link rel="shortcut icon" href="%VITE_FULL_URL%/imgs/favicon.ico" />
+    <link rel="shortcut icon" href="%VITE_FULL_URL%imgs/favicon.ico" />
 
     <script
       src="https://shared-assets.microbit.org/common/v1/common.js"