Keep the external script for test page by default

Author: helen

examples/index.html

@@ -60,8 +60,8 @@ <h2>Test by filling out the form and then refreshing the page or <a href="https:
   </form>
 
   <script type="module">
-    import {persistResumableFields, restoreResumableFields, setForm} from '../dist/index.js'
-    // import {persistResumableFields, restoreResumableFields, setForm} from 'https://unpkg.com/@github/session-resume/dist/index.js'
+    // import {persistResumableFields, restoreResumableFields, setForm} from '../dist/index.js'
+    import {persistResumableFields, restoreResumableFields, setForm} from 'https://unpkg.com/@github/session-resume/dist/index.js'
 
     // Listen for all form submit events and to see if their default submission
     // behavior is invoked.