Update shared assets (#602)

Author: microbit-robert

index.html

@@ -26,12 +26,12 @@
     <meta property="og:image" content="%VITE_FULL_URL%social.png" />
     <link rel="shortcut icon" href="%VITE_FULL_URL%imgs/favicon.ico" />
     <script
-      src="https://shared-assets.microbit.org/common/v1/common.js"
+      src="https://shared-assets.microbit.org/common/v2/common.js"
       async
     ></script>
     <link
       rel="stylesheet"
-      href="https://shared-assets.microbit.org/common/v1/main.css"
+      href="https://shared-assets.microbit.org/common/v2/main.css"
     />
     <script>
       // GA config itself is via the common assets config depending on consent.