Increase the max width to resize up to 512.

diff --git a/DragFrame.lua b/DragFrame.lua
index 7f33b48..0f5a970 100644
--- a/DragFrame.lua
+++ b/DragFrame.lua
@@ -25,7 +25,7 @@ local _, addon = ...
 local dragFrame = addon:NewModule("DragFrame")

 local MIN_RESIZE_WIDTH = 128
-local MAX_RESIZE_WIDTH = 500
+local MAX_RESIZE_WIDTH = 512

 dragFrame.frame = DefaultCastingBar_DragFrame