Instantly Bed is a simply datapack :

• BEFORE > When you were sleeping it took several long seconds!
• AFTER > When you sleep it only takes 1 second.

To update please follow the following steps :

• 1 - Look at the current version that is on your world/server with the command /function instantly_bed:load.
• 2 - Check here for the latest version available.
  • 2.1 - If you have the latest one, no need to change.
  • 2.2 - If it has a newer version do step 3.
• 3 - Close your server/world (To avoid any problems especially if you have other datapack/mod)
• 4 - Delete the old datapack to put the most recent ones in it.
• 5 - Restart your server/world and play!