add lastmod

Author: misostack

themes/2022/layouts/_default/baseof.html

@@ -102,7 +102,7 @@ <h4 class="footer-heading">Cheatsheet</h4>
           Powered by <a class="font-bold text-primary" href="https://gohugo.io/">Go Hugo</a> - Made
           with love from <a class="font-bold text-primary" href="{{ .Site.BaseURL }}">{{ .Site.Params.name }}</a> -
           Build
-          Version {{.Site.Lastmod}}
+          Version {{.Lastmod}}
         </div>
       </div>
     </footer>