Update to ubuntu-latest causing issues pulling containers from GHCR

[jsmilkstein]

TLDR: We use ubuntu-latest for all our runner images, and as of Monday 8/8, the image pulls of containers we published to ghcr are erroring with no matching manifest for linux/amd64 in the manifest list entries.

More details: These are containers using a couple different base images, constructed with docker compose, and pushed to GHCR, all as part of a workflow. I can verify the container is actually listed under artifacts. A subsequent workflow attempts to pull the image to build a test environment, and fails with the above message. Both parts of the workflow are using ubuntu-latest as the runner. I tried setting them back to 18.04 and it works, and ubuntu-latest worked up until the latest update (started failing on 8/8/2022).