Added missing Note getNote().

By: EvilSeph <evilseph@gmail.com>

paper-api/src/main/java/org/bukkit/block/NoteBlock.java

@@ -8,6 +8,13 @@ import org.bukkit.Note;
  */
 public interface NoteBlock extends BlockState {
 
+    /**
+     * Gets the note.
+     *
+     * @return
+     */
+    public Note getNote();
+
     /**
      * Gets the note.
      *