chore(package): update ghcr.io/devcontainers/features/docker-in-docker docker tag to v3 (#725)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| ghcr.io/devcontainers/features/docker-in-docker | feature | major |
`2` → `3` |

---

### Configuration

📅 **Schedule**: (in timezone America/Los_Angeles)

- Branch creation
  - At any time (no schedule defined)
- Automerge
  - At any time (no schedule defined)

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/marinatedconcrete/config).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xODIuMiIsInVwZGF0ZWRJblZlciI6IjQzLjIwOS40IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.devcontainer/devcontainer.json

@@ -32,7 +32,7 @@
     }
   },
   "features": {
-    "ghcr.io/devcontainers/features/docker-in-docker:2": {
+    "ghcr.io/devcontainers/features/docker-in-docker:3": {
       // We don't need this
       "dockerDashComposeVersion": "none",
       // Doesn't work on Debian Trixie