To update to this new version from version 4.x, run pihole -up . If you have been running the 5.0 beta release, run pihole checkout master to move from the beta to the master branch.
You mean at the bottom of that blog article? This article:
For me, the last text of that article is:
As there are also changes to the web interface in this version, you may need to clear your browser cache to ensure you can see the new changes. Usually CTRL+F5 will do the trick