Update docker/setup-buildx-action action to v2 (#8)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

action.yml

@@ -90,7 +90,7 @@ runs:
         docker context create buildx-context || true 
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v1
+      uses: docker/setup-buildx-action@v2
       with:
         endpoint: buildx-context