com.unity.xr.core-utils 2.5.2 Package Notes

Fixed the Project Validation window so that it draws the Web and Facebook Instant Games icons in the correct aspect ratio.
Fixed an error in the `PackageVersionUtility.UpdatePackageVersions` method where failed package manager requests were not handled, leading to a null reference exception.
Fixed error "InvalidOperationException: Cannot modify VisualElement hierarchy during layout calculation" in the `ProjectValidationSettingsProvider` where the drawer would clear during an asset refresh and cause a `NullReferenceException` when refreshing the Project Validation issue list. (XRCB-19)