build(deps): Bump ghcr.io/devcontainers/features/docker-in-docker

Bumps ghcr.io/devcontainers/features/docker-in-docker from 3.1.0 to 4.0.0.

---
updated-dependencies:
- dependency-name: ghcr.io/devcontainers/features/docker-in-docker
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.devcontainer/devcontainer.json

@@ -2,7 +2,7 @@
 	"name": "Alpine",
 	"image": "mcr.microsoft.com/devcontainers/base:alpine-3.21",
 	"features": {
-		"ghcr.io/devcontainers/features/docker-in-docker:3": {},
+		"ghcr.io/devcontainers/features/docker-in-docker:": {},
 		"ghcr.io/devcontainers/features/github-cli:1": {},
 		"ghcr.io/devcontainers-extra/features/act:1": {}
 	},