Disable linux/390x for now (#394)

Author: hardillb

.github/workflows/main.yml

@@ -143,7 +143,7 @@ jobs:
         continue-on-error: true
         with:
           context: .
-          platforms: linux/amd64, linux/arm64, linux/s390x, linux/arm/v7, linux/arm/v6
+          platforms: linux/amd64, linux/arm64, linux/arm/v7, linux/arm/v6
           push: ${{ steps.nrVersion.outputs.push }}
           file: .docker/Dockerfile.alpine 
           build-args: |