ci: fix multi-arch

Author: PhilippeVienne

.github/workflows/release.yml

@@ -10,6 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v2
     - name: Publish to Registry
       uses: elgohr/Publish-Docker-Github-Action@v5
       with:
@@ -18,4 +20,5 @@ jobs:
         password: ${{ secrets.GITHUB_TOKEN }}
         registry: ghcr.io
         tag_semver: true
+        platforms: linux/amd64,linux/arm64