Linux 5.13 is the big lure of this point release, carried over from October’s Ubuntu 21.10 release. Linux 5.13 introduces a bunch of tweaks including better EXT4 support, a new cooling driver for modern Intel CPUs, and better support for peripherals including the Apple Magic Mouse 2 and the GK6X mechanical keyboard.
Other updates bundled with the new ISO include GNOME Shell 3.36.8, LibreOffice 6.4.7.2, and Mozilla Firefox 97.
Ubuntu 20.04.4 LTS is available to download from the Ubuntu website, right now — though as it’s a 3.1GB download make sure you’re not on a capped connection when you do it.