chore(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/ci.yaml

@@ -57,7 +57,7 @@ jobs:
       packages: write
     steps:
       - uses: actions/checkout@v4
-      - uses: docker/setup-buildx-action@v3
+      - uses: docker/setup-buildx-action@v4
       - uses: docker/login-action@v3
         with:
           registry: ghcr.io

.github/workflows/release.yaml

@@ -18,7 +18,7 @@ jobs:
         with:
           go-version: "1.26"
 
-      - uses: docker/setup-buildx-action@v3
+      - uses: docker/setup-buildx-action@v4
 
       - uses: docker/login-action@v3
         with: