Update docker-publish.yml to build for arm too

.github/workflows/docker-publish.yml

@@ -32,7 +32,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
-
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
       # Install the cosign tool except on PR
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
@@ -71,6 +72,7 @@ jobs:
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
+          platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha