chore(deps): update actions/setup-node digest to 48b55a0 (#69)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/setup-node](https://redirect.github.com/actions/setup-node)
([changelog](https://redirect.github.com/actions/setup-node/compare/53b83947a5a98c8d113130e565377fae1a50d02f..48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e))
| action | digest | `53b8394` → `48b55a0` |

---

### Configuration

📅 **Schedule**: (UTC)

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

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, 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/cloudnative-pg/docs).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xMjMuOCIsInVwZGF0ZWRJblZlciI6IjQzLjEyMy44IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJhdXRvbWF0ZWQiLCJuby1pc3N1ZSJdfQ==-->

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

Author: renovate[bot]

.github/workflows/continuous-delivery.yml

@@ -30,7 +30,7 @@ jobs:
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Setup Node
-        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6
         with:
           # Use the latest LTS version of Node.js already installed on the runner.
           node-version: latest