Minecraft has released update 1.21.7 for Java Edition, featuring a "Good Boy" painting by artist Sarah Boeving and a "Lava Chicken" music disc by Hyper Potions. Players can obtain the Lava Chicken music disc by defeating a Chicken Jockey (a Baby Zombie riding a Chicken). The update also includes bug fixes and performance enhancements, such as resolving issues with moon and map displays, correcting text and sign rendering, fixing crashes on specific AMD graphics, addressing texture leaks and memory issues, improving underwater fog effects, and fixing breaking animations for various blocks. To download the update, players should open the Minecraft Launcher, navigate to the Installations tab, enable Snapshots, and select version 1.21.7. It is recommended to back up current worlds when using test updates.