Add LogLevelMax=3 to sysmotd.service

As the service runs every minute, the following logs are generated at equal frequency.

systemd[1]: Starting sysmotd.service - sysmotd service to update MOTD...
systemd[1]: sysmotd.service: Deactivated successfully.
systemd[1]: Finished sysmotd.service - sysmotd service to update MOTD.

LogLevelMax=3 covers errors and above which is more useful

Author: innovara

sysmotd/sysmotd.service

@@ -6,4 +6,5 @@ Type=oneshot
 User=root
 Group=root
 RemainAfterExit=no
-ExecStart=/usr/libexec/sysmotd
+ExecStart=/usr/libexec/sysmotd
+LogLevelMax=3