ERROR deprecated: .Site.LastChange was deprecated

[fintinc]

Description

ERROR deprecated: .Site.LastChange was deprecated in Hugo v0.123.0 and will be removed in Hugo 0.137.0. Use .Site.Lastmod instead.

in this file:
layouts/sitemapindex.xml

lines 6 and 7

.LastChange should be replaced by .Lastmod

{{ printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }} 
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"> 
  {{ range . }} 
  <sitemap> 
    <loc>{{ .SitemapAbsURL }}</loc> 
    {{ if not .LastChange.IsZero }} 
      <lastmod>{{ .LastChange.Format "2006-01-02T15:04:05-07:00" | safeHTML }}</lastmod> 
    {{ end }} 
  </sitemap>  
  {{ end }} 
</sitemapindex> 
{{/* Source: https://github.com/gohugoio/hugo/blob/master/tpl/tplimpl/embedded/templates/_default/sitemapindex.xml */}}

hugo v0.136.3+extended

[h-enk]

Thanks!