old_contents: from django.contrib import sitemaps
  from django.urls import reverse
  
  class StaticViewSitemap(sitemaps.Sitemap):
      priority = 0.8
      changefreq = 'weekly'
  
      def items(self):
          return ['index', 'about', ]
  
      def location(self, item):
          return reverse(item)
new_contents: from django.contrib import sitemaps
  from django.urls import reverse
  
  class StaticViewSitemap(sitemaps.Sitemap):
      priority = 0.8
      changefreq = 'weekly'
  
      def items(self):
          return ['index', 'about', 'install', ]
  
      def location(self, item):
          return reverse(item)
subject: update sitemaps