Bump docker/setup-buildx-action from 3 to 4 (#541)

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
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/aws-ecs-deploy-backend.yml

@@ -74,7 +74,7 @@ jobs:
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v3
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v3
+      uses: docker/setup-buildx-action@v4
     - name: Build and push
       uses: docker/build-push-action@v6
       with:

.github/workflows/aws-ecs-deploy-frontend.yml

@@ -78,7 +78,7 @@ jobs:
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v3
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v3
+      uses: docker/setup-buildx-action@v4
     - name: Build and push
       uses: docker/build-push-action@v6
       with: