Bump docker-in-docker feature version (#105)

dependabot changed the format in such a way that it fails to work on
devcontainer features. This is an attempt to fix it.

Issue was introduced by
#89. In [logs of
dependabot](https://github.com/eclipse-score/devcontainer/actions/runs/22949687988/job/66610909234#step:3:256)
is the following error message:

```
updater | 2026/03/11 11:10:49 ERROR <job_1275434594> Error processing ghcr.io/devcontainers/features/docker-in-docker (ArgumentError)
2026/03/11 11:10:49 ERROR <job_1275434594> Malformed version number string 
```

Author: lurtz

.devcontainer/devcontainer-lock.json

@@ -5,10 +5,10 @@
       "resolved": "ghcr.io/devcontainers-extra/features/pre-commit@sha256:6e0bb2ce80caca1d94f44dab5d0653d88a1c00984e590adb7c6bce012d0ade6e",
       "integrity": "sha256:6e0bb2ce80caca1d94f44dab5d0653d88a1c00984e590adb7c6bce012d0ade6e"
     },
-    "ghcr.io/devcontainers/features/docker-in-docker:": {
-      "version": "2.14.0",
-      "resolved": "ghcr.io/devcontainers/features/docker-in-docker@sha256:445e84b0c213225bfdae977a72b4125f65e38eadcd49616dae04f1af24aa122d",
-      "integrity": "sha256:445e84b0c213225bfdae977a72b4125f65e38eadcd49616dae04f1af24aa122d"
+    "ghcr.io/devcontainers/features/docker-in-docker": {
+      "version": "2.16.1",
+      "resolved": "ghcr.io/devcontainers/features/docker-in-docker@sha256:ce078b7bf7d9ef3bcb9813b32103795d8d72172446890b64772cbe1dec6baafd",
+      "integrity": "sha256:ce078b7bf7d9ef3bcb9813b32103795d8d72172446890b64772cbe1dec6baafd"
     }
   }
 }

.devcontainer/devcontainer-lock.json.license

@@ -1,7 +1,7 @@
 {
     "image": "mcr.microsoft.com/devcontainers/javascript-node:4-24",
     "features": {
-        "ghcr.io/devcontainers/features/docker-in-docker:": {
+        "ghcr.io/devcontainers/features/docker-in-docker": {
             "moby": "false" // does not work with Debian Trixie based images
         },
         "ghcr.io/devcontainers-extra/features/pre-commit:2": {