Devcontainer: bump base image Ubuntu version (#4277)

Author: MaxHorstmann

.devcontainer/devcontainer.json

@@ -1,8 +1,8 @@
 {
   "name": "Actions Runner Devcontainer",
-  "image": "mcr.microsoft.com/devcontainers/base:focal",
+  "image": "mcr.microsoft.com/devcontainers/base:noble",
   "features": {
-    "ghcr.io/devcontainers/features/docker-in-docker:1": {},
+    "ghcr.io/devcontainers/features/docker-in-docker:2": {},
     "ghcr.io/devcontainers/features/dotnet": {
       "version": "8.0.418"
     },