Update docker/setup-buildx-action action to v4.3.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker/setup-buildx-action	action	minor	v4.2.0 → v4.3.0

---

Release Notes

docker/setup-buildx-action (docker/setup-buildx-action)

v4.3.0

Compare Source

• Bump @​docker/actions-toolkit from 0.92.0 to 0.95.0 in #​595
• Bump brace-expansion from 1.1.13 to 1.1.18 in #​600
• Bump js-yaml from 5.2.0 to 5.3.0 in #​585
• Bump postcss from 8.5.10 to 8.5.25 in #​598
• Bump undici from 6.27.0 to 6.28.0 in #​601

Full Changelog: docker/setup-buildx-action@v4.2.0...v4.3.0

---

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.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[github-actions]

Approved automatically: low-risk dependency update carrying the automerge label.