1.2.5 Nuget release

1.2.5:
Fix for Null ILogger passed to the AzAuth Client Creators causing a fault. Git: #481
Fix for Memory Leak in Retrieve Multiple. Git: #463
Fix for Memory bloat issue caused by not releasing lastErrorMessage property.
Updated Error messages verbosity when checking for authority from Dataverse during onboard auth phase.
Dependency changes:
System.ServiceModel.Http updated to 8.1.2
REMOVED .net 6.0 Targets. .net 6.0 is no longer in support.

What's Changed

• Resync from mainline. by @MattB-msft in #505

Full Changelog: 1.2.3...1.2.5