Download 2022-04-04-raspios-bullseye-armhf-lite-firstboot.img

SHA-256 (unzipped): ef92b3875507dafa70fd41f08f79dca4d39f9d35bab1faf0d01f939b9cd68629

Updated Raspberry Pi OS (32-bit) Lite version 2022-04-04 from https://www.raspberrypi.com/software/operating-systems/

Release date: April 4th 2022
System: 32-bit
Kernel version: 5.15
Debian version: 11 (bullseye)
Size: 297MB
Release notes

Note: there is no default `pi` user anymore - you'll need to create a `userconf.txt` file as described here.