update gotify to v2.5.0

[oliv99]

gotify v2.4 was installed 6 month ago with tteck LXC script
I have updated it manually as I could not find a way to do it automatically via the original script
here is how

pct enter <ctid> # login into the LXC container <ctid>
systemctl status gotify
systemctl stop gotify # stop the service
cd /opt/gotify/ # goto install directory
wget https://github.com/gotify/server/releases/download/v2.5.0/gotify-linux-amd64.zip
unzip gotify-linux-amd64.zip
chmod +x gotify-linux-amd64
systemctl start gotify # restart the service
systemctl status gotify # and verify
rm gotify-linux-amd64.zip # cleanup

[havardthom]

Fixed in #3989, you can type update in LXC to update Gotify next time