docs(xoa): NTP synchronization with systemd-timesyncd

docs/docs/xoa.md

@@ -230,7 +230,7 @@ You can verify that your time is correctly set with the `date` command. To set X
 
 ## Setting a custom NTP server
 
-By default, XOA is configured to use the standard Debian NTP servers:
+By default, XOA is configured to use the `systemd-timesyncd` daemon, along with the standard Debian NTP servers:
 
 ```
 pool 0.debian.pool.ntp.org iburst
@@ -239,11 +239,18 @@ pool 2.debian.pool.ntp.org iburst
 pool 3.debian.pool.ntp.org iburst
 ```
 
-If you'd like to use your own NTP server or another pool, you can make the changes directly in `/etc/ntp.conf`.
+If you'd like to use another pool, you can make the changes directly in `/etc/systemd/timesyncd.conf`.
 
-You will need to be root to edit this file (or use `sudo`). We recommend adding your custom server to the top of the list, leaving the debian server entries if possible.
+You will need to be root to edit this file (or use `sudo`). We recommend adding your custom server to the top of the list, leaving the Debian server entries if possible.
 
-For changes to take effect, you will need to restart NTP: `sudo systemctl restart ntp.service`.
+If you'd like to simply change NTP servers, use the `xoa network ntp` command:
+
+```console
+$ xoa network ntp
+? NTP servers (space separated)
+```
+
+For changes to take effect, you will need to restart NTP: `systemctl restart systemd-timesyncd.service`.
 
 ## Restart the service