Upgrade `docker/setup-buildx-action` to 3 version (#1264)

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

.github/workflows/docker.yml

@@ -38,7 +38,7 @@ jobs:
         with:
           fetch-depth: 0  # for correct image labeling via `git describe --tags`
       - uses: docker/setup-qemu-action@v2
-      - uses: docker/setup-buildx-action@v2
+      - uses: docker/setup-buildx-action@v3
 
       - name: Detect correct Git ref for image build
         id: git