chore(deps): update docker/login-action digest to abd2ef4 (#126)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [docker/login-action](https://redirect.github.com/docker/login-action)
([changelog](https://redirect.github.com/docker/login-action/compare/06fb636fac595d6fb4b28a5dfcb21a6f5091859c..abd2ef45e78c5afb21d64d4ca52ee8550d9572c7))
| action | digest | `06fb636` → `abd2ef4` |

---

### Configuration

📅 **Schedule**: (UTC)

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

🚦 **Automerge**: Enabled.

♻ **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/cloudnative-pg/docs).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4yNzUuMiIsInVwZGF0ZWRJblZlciI6IjQzLjI4MC4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJhdXRvbWF0ZWQiLCJuby1pc3N1ZSJdfQ==-->

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/build_containers.yml

@@ -20,7 +20,7 @@ jobs:
       packages: write
     steps:
       - name: Login to Docker Hub
-        uses: docker/login-action@06fb636fac595d6fb4b28a5dfcb21a6f5091859c # v4
+        uses: docker/login-action@abd2ef45e78c5afb21d64d4ca52ee8550d9572c7 # v4
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ env.REGISTRY_USER }}