fix: don't track me

The matomo iframe don't work on this page

The loading of “https://stats.esprit-libre-conseil.com/index.php?module=CoreAdminHome&action=optOut&language=fr&backgroundColor=&fontColor=&fontSize=&fontFamily=” in a frame is denied by “X-Frame-Options“ directive set to “sameorigin“.

https://developer.mozilla.org/fr/docs/Web/HTTP/Headers/X-Frame-Options