chore(pagefind): update usage of pagefind

Author: timmywil

_includes/layouts/base.njk

@@ -138,7 +138,7 @@
         <a href="https://openjsf.org">The OpenJS Foundation</a>
       </footer>
     </div>
-    <script src="/_pagefind/pagefind-ui.js" type="text/javascript"></script>
+    <script src="/pagefind/pagefind-ui.js" type="text/javascript"></script>
     <script>
       window.addEventListener('DOMContentLoaded', (event) => {
         new PagefindUI({
@@ -152,4 +152,4 @@
       })
     </script>
   </body>
-</html>
+</html>

pagefind.yml

@@ -1,2 +1,2 @@
-source: _site
+site: _site
 glob: '{milestone,ticket}/**/*.{html}'