Update Entities.md

docs/scarpet/api/Entities.md

@@ -761,7 +761,7 @@ players, since they are controlled client side.
 ### `modify(e, 'effect', name?, duration?, amplifier?, show_particles?, show_icon?, ambient?)`
 
 Applies status effect to the living entity. Takes several optional parameters, which default to `0`, `true`, 
-`true` and `false`. If no duration is specified, or if it's null or 0, the effect is removed. If name is not specified,
+`true` and `false`. If no duration is specified, or if it's null or 0, the effect is removed. If duration is -1, it will represent infinity. If name is not specified,
 it clears all effects.
 
 ### `modify(e, 'health', float)`