Update README.md

- Updated to 1.19.4
- `/health add` no longer deals damage with negative values

README.md

@@ -42,6 +42,7 @@ Other than being a useful API, the Dawn API is also bundled with some in-game to
 - `/foodbar` - A command that allows easy control over an entity's food/saturation points.
 - `/motion` - A command that allows easy control over an entity's motion (velocity).
 - `/export` - A command that can export information/files of the game's content.
+- `/shape` - A command that allows easy creation of custom shapes. (supports data pack)
 - A custom TNT entity with more NBT data parameters than the vanilla TNT entity.
 - A flying block entity which reflects the flying counterpart of the vanilla falling block entity.