Update build workflow to target only linux/amd64 platform for Docker publishing

Author: npv2k1

.github/workflows/build.yaml

@@ -20,7 +20,7 @@ jobs:
     steps:
       - uses: pnstack/actions/docker-publish@main
         with:
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64
           dockerfile: Dockerfile
           context: .
           push_enabled: true