Fixes link to the "update guidelines" (#1740)

cli/README.md

@@ -100,4 +100,4 @@ Example to get the number of feeds of a given user:
 # Install and updates
 
 If you want to administrate FreshRSS using git, please read our [installation docs](https://freshrss.github.io/FreshRSS/en/admins/02_Installation.html)
-and [update guidelines](https://freshrss.github.io/FreshRSS/en/users/08_Updating.html). 
+and [update guidelines](https://freshrss.github.io/FreshRSS/en/admins/03_Updating.html).