fix: add dockerbuildx configuration (#16)

Author: xoanmm

.github/workflows/release.yaml

@@ -20,6 +20,9 @@ jobs:
         with:
           go-version: 1.16.x
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v1
         with: