.NET 8.0.20

Release

What's Changed

• [release/8.0] Merge release/8.0 => release/8.0-staging by @cincuranet in #36197
• Update branding to 8.0.20 by @vseanreesermsft in #36497
• [release/8.0] Dispose related readers in GroupBySplitQueryingEnumerable (#36484) by @roji in #36489
• Merging internal commits for release/8.0 by @vseanreesermsft in #36512
• [release/8.0] Update dependencies from dotnet/arcade by @dotnet-maestro[bot] in #36533
• [release/8.0] Merge release/8.0-staging to release/8.0 by @cincuranet in #36531

Full Changelog: v8.0.19...v8.0.20