Release .NET 9.0.4 · dotnet/aspnetcore

What's Changed

Update branding to 9.0.4 by @vseanreesermsft in #60785
[release/9.0] Update dependencies from dotnet/extensions by @dotnet-maestro in #60445
[release/9.0] (deps): Bump src/submodules/googletest from e235eb3 to 24a9e94 by @dependabot in #60678
[release/9.0] Update dependencies from dotnet/arcade by @dotnet-maestro in #60356
Fix OpenAPI server URLs for Aspire scenarios by @captainsafia in #60673
Fix self-referential schema handling in collection schemas by @captainsafia in #60410
[release/9.0] [Blazor] Fix custom elements JS assets not being included in build output by @MackinnonBuck in #60858
Merging internal commits for release/9.0 by @vseanreesermsft in #60880

Full Changelog: v9.0.3...v9.0.4