Update container.yml

Don't need the `context` field?

Author: sourcefrog

.github/workflows/container.yml

@@ -46,7 +46,6 @@ jobs:
         id: push
         uses: docker/build-push-action@v6
         with:
-          context: .
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}