com.unity.addressables 2.8.1 Package Notes

Fixed an issue where NullReferenceException error and warnings are thrown when opening Addressables Report window.
Upgrade references from UnityEditor.GUID to UnityEngine.GUID on Unity 6.4+.
Setting catalog timeout correctly during the build so remote catalog operations can timeout successfully.
Revert yielding when calculating size in GetDownloadSizeAsync.
Fixed performance issue when moving Addressable Assets from one group to another using the context menu option "Move Addressables to Group..."