Fix building project in devcontainer

Bi0T1N · Bi0T1N · commit 81f282db4ef6 · 2025-01-31T21:52:49.000+01:00
the SDK version is defined as v9.0 in global.json and hence
it shows that NET 9.0 is missing in the dotnet v8.0 container

compiling and running the tests works now:
dotnet test --framework net9.0 src/
diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/devcontainers/dotnet:dev-8.0
+FROM mcr.microsoft.com/devcontainers/dotnet:dev-9.0
 
 # [Optional] Uncomment this section to install additional OS packages.
 # RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-FROM mcr.microsoft.com/devcontainers/dotnet:dev-8.0`
	`1`	`+FROM mcr.microsoft.com/devcontainers/dotnet:dev-9.0`
`2`	`2`
`3`	`3`	`# [Optional] Uncomment this section to install additional OS packages.`
`4`	`4`	`# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \`