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Trello card
https://trello.com/c/frBHpavp
Context
New buildx generates a new OCI format with support for provenance. It doesn't work with Cloud foundry.
Error during staging:
Related to: docker/buildx#1533
Changes proposed in this pull request
Pin buildx to 0.9.1
Guidance to review
Successful run: https://github.com/DFE-Digital/get-into-teaching-app/actions/runs/3968392428