Update branding to 8.0.20#13774

LeafShi1 merged 1 commit intodotnet:release/8.0dotnet/winforms:release/8.0from

vseanreesermsft:branding-8.0.20-2025-08-04-1038-bf99b2d0-74de-4ba3-b84a-9fed7c8b36f1vseanreesermsft/winforms:branding-8.0.20-2025-08-04-1038-bf99b2d0-74de-4ba3-b84a-9fed7c8b36f1Copy head branch name to clipboard