Restore legacy book linking sound

README.md

@@ -19,6 +19,9 @@ survives inventory and world saves. Travel only succeeds if the target
 dimension is loaded and a non-fluid, passable landing position can be found
 nearby.
 
+Successful book travel plays Mystcraft Legacy's original linking sound at both
+the departure and arrival locations.
+
 Right-click an empty vanilla lectern with a Rivencraft book to convert it into
 a Book Stand and place the book on it. Use a Linking Book on the stand by
 right-clicking with an empty hand. Sneak-right-click with an empty hand to take