chore(deps): update docker/setup-buildx-action action to v4

[self-hosted-renovatebot]

This PR contains the following updates:

Package	Type	Update	Change
docker/setup-buildx-action	action	major	v3 → v4

---

Release Notes

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

v4.2.0

Compare Source

• Preserve names in esbuild bundle by @​crazy-max in #​572
• Bump @​actions/core from 3.0.0 to 3.0.1 in #​551
• Bump @​docker/actions-toolkit from 0.90.0 to 0.92.0 in #​557 #​580
• Bump @​sigstore/core from 3.1.0 to 3.2.1 in #​573
• Bump @​sigstore/verify from 3.1.0 to 3.1.1 in #​576
• Bump js-yaml from 4.1.1 to 5.2.0 in #​562
• Bump sigstore from 4.1.0 to 4.1.1 in #​577
• Bump tmp from 0.2.5 to 0.2.7 in #​556
• Bump undici from 6.25.0 to 6.27.0 in #​570
• Bump vite from 7.3.2 to 7.3.6 in #​569

Full Changelog: docker/setup-buildx-action@v4.1.0...v4.2.0

v4.1.0

Compare Source

• Bump @​docker/actions-toolkit from 0.79.0 to 0.90.0 in #​489
• Bump brace-expansion from 1.1.12 to 5.0.6 in #​547 #​508
• Bump fast-xml-builder from 1.0.0 to 1.2.0 in #​540
• Bump fast-xml-parser from 5.4.2 to 5.8.0 in #​496
• Bump flatted from 3.3.3 to 3.4.2 in #​499
• Bump glob from 10.3.12 to 13.0.6 in #​495
• Bump handlebars from 4.7.8 to 4.7.9 in #​504
• Bump lodash from 4.17.23 to 4.18.1 in #​523
• Bump picomatch from 4.0.3 to 4.0.4 in #​503
• Bump postcss from 8.5.6 to 8.5.10 in #​537
• Bump tar from 6.2.1 to 7.5.15 in #​545
• Bump undici from 6.23.0 to 6.25.0 in #​492
• Bump vite from 7.3.1 to 7.3.2 in #​520

Full Changelog: docker/setup-buildx-action@v4.0.0...v4.1.0

v4.0.0

Compare Source

• Node 24 as default runtime (requires Actions Runner v2.327.1 or later) by @​crazy-max in #​483
• Remove deprecated inputs/outputs by @​crazy-max in #​464
• Switch to ESM and update config/test wiring by @​crazy-max in #​481
• Bump @​actions/core from 1.11.1 to 3.0.0 in #​475
• Bump @​docker/actions-toolkit from 0.63.0 to 0.79.0 in #​482 #​485
• Bump js-yaml from 4.1.0 to 4.1.1 in #​452
• Bump lodash from 4.17.21 to 4.17.23 in #​472
• Bump minimatch from 3.1.2 to 3.1.5 in #​480

Full Changelog: docker/setup-buildx-action@v3.12.0...v4.0.0

v4

Compare Source

---

Configuration

📅 Schedule: (UTC)

• 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.

---

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

---

This PR has been generated by Mend Renovate.

[gitops-autobot-reviewer-cresta]

Auto-approved: PR created by known bot user @self-hosted-renovatebot[bot]

[cursor]

PR Summary

Low Risk
Single-line CI dependency bump with no application or secret-handling changes; main caveat is v4’s runner requirement on self-hosted runners.

Overview
Updates the Build job in .github/workflows/build.yml so the Set up Docker Buildx step uses docker/setup-buildx-action@v4 instead of @v3. Step inputs (install: true, id: buildx) are unchanged; nothing in the workflow references Buildx step outputs.

This is a major action release (Node 24 runtime, ESM, removed deprecated inputs/outputs). The workflow’s current usage should stay compatible.

^{Reviewed by Cursor Bugbot for commit 5412f0b. Bugbot is set up for automated code reviews on this repo. Configure here.}