fix typo

Author: lodewiges

app/views/layouts/application.html.erb

@@ -6,7 +6,7 @@
 
     <%= csrf_meta_tags %>
     <%= csp_meta_tag %>
-    <%= favicon_link_tag 'favicon.ico' %>
+    <%= favicon_link_tag '/favicon.ico' %>
 
     <%= stylesheet_link_tag "application", "data-turbo-track": "reload" %>
     <%= javascript_include_tag "application", "data-turbo-track": "reload", defer: true %>