use `.last` instead

app/helpers/page_layout_helper.rb

@@ -5,7 +5,7 @@ module PageLayoutHelper
     @page_title.push(*titles.compact) if titles.any?
 
     if show_new_nav? && titles.any? && !defined?(@breadcrumb_title)
-      @breadcrumb_title = @page_title[-1]
+      @breadcrumb_title = @page_title.last
     end
 
     # Segments are seperated by middot