Update ghcr.io/devcontainers/features/docker-in-docker Docker tag to v4

Author: renovate[bot]

.devcontainer/devcontainer.json

@@ -3,7 +3,7 @@
   "image": "mcr.microsoft.com/devcontainers/base:bullseye",
 
   "features": {
-    "ghcr.io/devcontainers/features/docker-in-docker:2": {
+    "ghcr.io/devcontainers/features/docker-in-docker:4": {
       "version": "latest",
       "enableNonRootDocker": "true",
       "moby": "true"