Change to root user
sudo su -

Enter Libreddit LXC Container
lxc-attach -n libreddit

Copy current binary file
cp -ar /usr/bin/libreddit /usr/bin/libreddit-old

Download new binary from github
curl -OL https://github.com/libreddit/libreddit/releases/download/v0.24.0/libreddit

Make Executable and replace existing binary
chmod 755 libreddit && mv libreddit /usr/bin/libreddit

Restart Libreddit
systemctl restart libreddit.service

After testing, the libreddit-old binary can be removed