chore(deps): update docker/setup-buildx-action action to v3.12.0 (#343)

This PR contains the following updates:

| Package | Type | Update | Change | OpenSSF |
|---|---|---|---|---|
|
[docker/setup-buildx-action](https://redirect.github.com/docker/setup-buildx-action)
| action | minor | `v3.11.1` -> `v3.12.0` | [![OpenSSF
Scorecard](https://api.securityscorecards.dev/projects/github.com/docker/setup-buildx-action/badge)](https://securityscorecards.dev/viewer/?uri=github.com/docker/setup-buildx-action)
|

---

### Release Notes

<details>
<summary>docker/setup-buildx-action
(docker/setup-buildx-action)</summary>

###
[`v3.12.0`](https://redirect.github.com/docker/setup-buildx-action/compare/v3.11.1...v3.12.0)

[Compare
Source](https://redirect.github.com/docker/setup-buildx-action/compare/v3.11.1...v3.12.0)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - Only on Sunday and Saturday ( * * * * 0,6 ) in timezone
Europe/Dublin.

🚦 **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

---

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

Author: renovate[bot]

.github/workflows/docker.yml

@@ -38,7 +38,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ github.token }}
       - uses: docker/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130 # v3.7.0
-      - uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+      - uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
       - uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
         id: meta
         env: