build(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 3.12.0 to 4.0.0.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@v3.12.0...v4.0.0)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -132,7 +132,7 @@ jobs:
             org.opencontainers.image.authors=Geoff Bourne <itzgeoff@gmail.com>
 
       - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v3.12.0
+        uses: docker/setup-buildx-action@v4.0.0
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3.7.0

.github/workflows/verify-pr.yml

@@ -59,7 +59,7 @@ jobs:
           fetch-depth: 0
 
       - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v3.12.0
+        uses: docker/setup-buildx-action@v4.0.0
 
       - name: Confirm multi-arch build
         uses: docker/build-push-action@v6.19.2