Use Ability.allowed? instead of current_user.can? in AccessRequestsFinder

Signed-off-by: NRémy Coutable <remy@rymai.me>

app/finders/access_requests_finder.rb

@@ -22,6 +22,6 @@ class AccessRequestsFinder
   private
 
   def can_see_access_requests?(current_user)
-    source && current_user && current_user.can?(:"admin_#{source.class.to_s.underscore}", source)
+    source && Ability.allowed?(current_user, :"admin_#{source.class.to_s.underscore}", source)
   end
 end