Update NotifyIcon.cs

Author: nkguo

src/Shared/HandyControl_Shared/Controls/Other/NotifyIcon.cs

@@ -153,7 +153,7 @@ public void ShowBalloonTip(string title, string content, NotifyIconInfoType info
             uID = _id,
             szInfoTitle = title ?? string.Empty,
             szInfo = content ?? string.Empty,
-            uCallbackMessage = WmTrayMouseMessage
+            uCallbackMessage = InteropValues.WM_TRAYMOUSEMESSAGE
         };
 
         data.dwInfoFlags = infoType switch