change link to local lunr

_includes/search.html

@@ -15,7 +15,7 @@
     </tbody>
 </table>
 
-<script src="https://cdnjs.cloudflare.com/ajax/libs/lunr.js/2.3.8/lunr.min.js" integrity="sha256-34Si1Y6llMBKM3G0jQILVeoQKEwuxjbk4zGWXXMT4ps=" crossorigin="anonymous"></script>
+<script src="{{ "assets/js/lunr.min.js" | relative_url }}" integrity="sha256-34Si1Y6llMBKM3G0jQILVeoQKEwuxjbk4zGWXXMT4ps=" crossorigin="anonymous"></script>
 
 <script>
     var el_table_body = document.getElementById('search_results_tbody');