Add heal to README

README.md

@@ -66,6 +66,8 @@ Sleeping doesn't skip night, but speeds it up. The more players, the faster it g
   One can instantly skip, but only a part of the night. \
   There's 5 players on the server. A night is 10 minutes long. \
   Each player can instantly skip 2 minutes of the night at any time, even if others aren't sleeping
+- Heal \
+  Sleeping heals
 
 ### Authentication
 Players are given a unique subdomain like "\<key>.example.com" and they must use it to join \