build(deps): bump docker/setup-buildx-action from 3 to 4

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 3 to 4.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@v3...v4)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/docker-release.yml

@@ -36,7 +36,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Docker Builder
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
@@ -137,7 +137,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Docker Builder
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v3

.github/workflows/install-smoke.yml

@@ -41,7 +41,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Docker Builder
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       # Blacksmith can fall back to the local docker driver, which rejects gha
       # cache export/import. Keep smoke builds driver-agnostic.

.github/workflows/sandbox-common-smoke.yml

@@ -27,7 +27,7 @@ jobs:
           submodules: false
 
       - name: Set up Docker Builder
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build minimal sandbox base (USER sandbox)
         shell: bash