Containers ASP.NET Composite benchmarks are broken

[sebastienros]

Step 5/8 : FROM mcr.microsoft.com/dotnet/nightly/aspnet:9.0-alpine-composite AS runtime
manifest for mcr.microsoft.com/dotnet/nightly/aspnet:9.0-alpine-composite not found: manifest unknown: manifest tagged by "9.0-alpine-composite" is not found

in https://github.com/aspnet/Benchmarks/blob/main/docker/container-matrix/Middleware-composite.dockerfile

@ivdiazsa

[ivdiazsa]

This looks extremely strange. I will take a look

[ivdiazsa]

I've found the problem. They changed 9.0-alpine-composite to 9.0-preview-alpine-composite. I'll send a PR with the updated change