Update index.html

examples/text-selection/index.html

@@ -13,7 +13,7 @@
         <script src="../../web/ui_utils.js"></script>
         <script src="../../web/text_layer_builder.js"></script>
 
-        <script src="text/javascript">
+        <script type="text/javascript">
              // Specify the main script used to create a new PDF.JS web worker.
              // In production, change this to point to the combined `pdf.js` file.
          </script>