Fix Altair GraphQL loading

Due to recent changes in Altair GraphQL v8.4.0 (updating the angular version and build system which uses native ESM module imports), the current static boilerplate no longer works properly.

Updating the script tags as appropriate to conform to the new setup.

Author: imolorhe

src/Ui.Altair/Internal/altair.cshtml

@@ -31,11 +31,10 @@
       </div>
     </div>
   </app-root>
-  <script rel="preload" as="script" type="text/javascript" src="//cdn.jsdelivr.net/npm/altair-static/build/dist/runtime.js"></script>
-  <script rel="preload" as="script" type="text/javascript" src="//cdn.jsdelivr.net/npm/altair-static/build/dist/polyfills.js"></script>
-  <script rel="preload" as="script" type="text/javascript" src="//cdn.jsdelivr.net/npm/altair-static/build/dist/main.js"></script>
+  <script type="module" src="//cdn.jsdelivr.net/npm/altair-static/build/dist/polyfills.js"></script>
+  <script type="module" src="//cdn.jsdelivr.net/npm/altair-static/build/dist/main.js"></script>
 
-  <script>
+  <script type="module">
     function getSubscriptionsEndPoint() {
       let subscriptionsEndPoint = "@Model.SubscriptionsEndPoint";
       if (/^(?:[a-z]+:)?\/\//i.test(subscriptionsEndPoint)) {