chore: [.devcontainer/devcontainer.json] Bump Docker version (jenkins-docs#1822)

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.devcontainer/devcontainer.json

@@ -4,7 +4,7 @@
 
   "features": {
     "ghcr.io/devcontainers/features/docker-in-docker:2": {
-      "version": "28.5",
+      "version": "",
       "dockerDashComposeVersion": "v2"
     },
     "ghcr.io/devcontainers/features/github-cli:1": {