Bump docker/setup-buildx-action from 1.3.0 to 1.4.0

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@v1.3.0...v1.4.0)

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

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

.github/workflows/deploy.yml

@@ -51,7 +51,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1.2.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1.3.0
+        uses: docker/setup-buildx-action@v1.4.0
       - name: Login to DockerHub
         uses: docker/login-action@v1.10.0
         with:

.github/workflows/dev.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1.2.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1.3.0
+        uses: docker/setup-buildx-action@v1.4.0
       - name: Login to DockerHub
         uses: docker/login-action@v1.10.0
         with: