Update index.md

Author: jkunze

content/_pages/index.md

@@ -59,7 +59,7 @@ joining one of its [working groups].
 
 | ![][2]{: .img-thumbnail .img-fluid width="1024" height="638"} |
 |:--:|
-| _Working on the ARK. From a 1401 manuscript page, illuminated by Johannette Ravenelle, that itself has an ARK identifier: <https://gallica.bnf.fr/ark:/12148/btv1b8449691v/f29> (source gallica.bnf.fr, National Library of France)._ |
+| _Working on the ARK. From a 1401 manuscript page, illuminated by Johannette Ravenelle, that itself has an ARK identifier: <https://ark.bnf.fr/ark:/12148/btv1b8449691v/f29> (source gallica.bnf.fr, National Library of France)._ |
 
 [{{ site.num_ark_orgs }} organizations]: community.md
 [1]: ../assets/images/pages/index/ark_things.png