Release

What's Changed

• Update branding to 8.0.20 by @vseanreesermsft in #11027
• Merging internal commits for release/8.0 by @vseanreesermsft in #11035
• [release/8.0] Update dependencies from dotnet/arcade by @dotnet-maestro[bot] in #11040

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