fix(docs): defer entry js (#2856)

apps/docs/index.html

@@ -29,7 +29,7 @@
       <div class="spinner"></div>
     </div>
     <!--/placeholder1-->
-    <script src="./src/index.tsx" async type="module"></script>
+    <script src="./src/index.tsx" defer type="module"></script>
     <!--placeholder2-->
     <!--/placeholder2-->
   </body>