chore(deps): bump docker/setup-buildx-action from 1.5.1 to 1.6.0 (#2168)

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 1.5.1 to 1.6.0.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](https://github.com/docker/setup-buildx-action/compare/v1.5.1...v1.6.0)

---
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>

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

.github/workflows/default_on_push.yml

@@ -23,7 +23,7 @@ jobs:
         with:
           submodules: recursive
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1.5.1
+        uses: docker/setup-buildx-action@v1.6.0
         id: buildx
       - name: Cache Docker layers
         uses: actions/cache@v2.1.6
@@ -77,7 +77,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1.2.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1.5.1
+        uses: docker/setup-buildx-action@v1.6.0
         id: buildx
       - name: Cache Docker layers
         uses: actions/cache@v2.1.6

.github/workflows/scheduled_builds.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1.2.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1.5.1
+        uses: docker/setup-buildx-action@v1.6.0
         id: buildx
       - name: Login to DockerHub
         uses: docker/login-action@v1.10.0

.github/workflows/test_merge_requests.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1.2.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1.5.1
+        uses: docker/setup-buildx-action@v1.6.0
         id: buildx
       - name: Cache Docker layers
         uses: actions/cache@v2.1.6