.NET 9 is missing in docker image

**Describe the bug**
Azure devops build issue:

```
Digest: sha256:41473a2ebc45daa6e63c82a7f32a5680b0fe34dac49ab85dd6369c764b191308
Status: Downloaded newer image for mcr.microsoft.com/appsvc/staticappsclient:stable
benv: dotnet version '9.x' not found.
benv: Could not find any versions on disk.
```

**To Reproduce**
I use Azure Static web Site for Blazor WebAssembly app.
I update my app to .NET 9
My azure devops pipeline looks like this.
```
- task: AzureStaticWebApp@0
displayName: 'Deploy to Azure Static Web App'
inputs:
app_location: 'App.WebClient/'
output_location: 'wwwroot'
azure_static_web_apps_api_token: $(AZURE_STATIC_WEB_APPS_API_TOKEN)
```

How can I fix this issee? seems we have old container with .NET8

Status: Downloaded newer image for **mcr.microsoft.com/appsvc/staticappsclient:stable**
benv: dotnet version '**9.x**' not found.

Start by reproducing the AzureStaticWebApp@0 pipeline with the App.WebClient/ app location and a .NET 9 Blazor WebAssembly app. Inspect the mcr.microsoft.com/appsvc/staticappsclient:stable image and its benv-supported SDK versions; done means the pipeline recognizes dotnet 9.x and deploys successfully.

Written by the indexing model from the issue text.