Integration tests periodically fail with 503

[omus]

 #5 [internal] load metadata for docker.io/library/debian:12.9
#5 ERROR: unexpected status from HEAD request to https://registry-1.docker.io/v2/library/debian/manifests/12.9: 503 Service Unavailable
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 > [internal] load metadata for docker.io/library/debian:12.9:
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Dockerfile:8
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   6 |     
   7 |     ARG DEBIAN_VERSION=bullseye
   8 | >>> FROM debian:$DEBIAN_VERSION
   9 |     
  10 |     # Reduces output from `apt-get`
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ERROR: failed to solve: debian:12.9: unexpected status from HEAD request to https://registry-1.docker.io/v2/library/debian/manifests/12.9: 503 Service Unavailable
Error: buildx failed with: ERROR: failed to solve: debian:12.9: unexpected status from HEAD request to https://registry-1.docker.io/v2/library/debian/manifests/12.9: 503 Service Unavailable

– https://github.com/beacon-biosignals/docker-build/actions/runs/13019928430/job/36318028887#step:5:1003

May want to introduce an automatic retry