Docker: try again to add armv7 support

Let's see if the actions are more stable now

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

.github/workflows/docker.yml

@@ -165,7 +165,7 @@ jobs:
           context: .
           builder: ${{ steps.builder.outputs.name }}
           file: ./${{ steps.info.outputs.dockerfile }}
-          platforms: linux/amd64,linux/arm64,linux/ppc64le
+          platforms: linux/amd64,linux/arm64,linux/ppc64le,linux/arm/v7
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.info.outputs.tags }}
           build-args: |