Add xmldoc on State

osu.Game/Rulesets/Objects/Drawables/DrawableHitObject.cs

@@ -128,6 +128,12 @@ public abstract class DrawableHitObject : SkinReloadableDrawable
 
         private readonly Bindable<ArmedState> state = new Bindable<ArmedState>();
 
+        /// <summary>
+        /// The state of this <see cref="DrawableHitObject"/>.
+        /// </summary>
+        /// <remarks>
+        /// For pooled hitobjects, <see cref="ApplyCustomUpdateState"/> is recommended to be used instead for better editor/rewinding support.
+        /// </remarks>
         public IBindable<ArmedState> State => state;
 
         /// <summary>