Infra: Get rid of `unknown/unknown` image arch

[Haarolean]

Since #347 got merged, there's a new unknown/unknown image arch present in our images for some reason: https://github.com/kafbat/kafka-ui/pkgs/container/kafka-ui/285510516?tag=07f0e0e75471a44be52782b06d0362c42820cba1

https://github.com/docker/build-push-action/issues/820#issuecomment-1486849546