Bump docker/setup-buildx-action from 1 to 2 (#114)

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -155,7 +155,7 @@ jobs:
           path: ${{ github.workspace }}/build/.out/gateway
           key: nginx-kubernetes-gateway-${{ github.run_id }}-${{ github.run_number }}
       - name: Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
       - name: Build Image Debian
         uses: docker/build-push-action@v3
         with: