Bump docker/setup-buildx-action from 1.7.0 to 2 (kubernetes#7075)

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 1.7.0 to 2.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@f211e3e...dc7b971)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  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/cd-workflow.yml

@@ -70,7 +70,7 @@ jobs:
 
       - name: Set up Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@f211e3e9ded2d9377c8cadc4489a4e38014bc4c9 # v1
+        uses: docker/setup-buildx-action@dc7b9719a96d48369863986a06765841d7ea23f6 # v1
 
       - name: Docker Login
         env:
@@ -129,7 +129,7 @@ jobs:
 
       - name: Set up Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@f211e3e9ded2d9377c8cadc4489a4e38014bc4c9 # v1
+        uses: docker/setup-buildx-action@dc7b9719a96d48369863986a06765841d7ea23f6 # v1
 
       - name: Docker Login
         env: