style: replace accept legacy icon

app/components/dossiers/autosave_footer_component/autosave_footer_component.html.haml

@@ -11,7 +11,7 @@
       = link_to t('.more_information'), t("links.common.faq.autosave_url"), class: 'autosave-more-infos fr-link fr-link--sm', **external_link_attributes
 
   %p.autosave-status.succeeded.fr-mb-0
-    %span.autosave-icon.icon.accept
+    = dsfr_icon('fr-icon-checkbox-circle-fill fr-text-default--success autosave-icon')
     %span.autosave-label
       - if annotation?
         = t('.annotations.confirmation')