Migrate existing repos to new actions

[puerco]

Existing repos depending on the SLSA provenance workflow here need to be migrated to use the new actions repo.

Repository checklist

• kairoaraujo/tufie
• michaelwinser/gradually
• slsa-framework/slsa-source-poc < this repo (Use new actions on local attest #257)
• TomHennen/Concordance
• TomHennen/slsa-source-poc
• TomHennen/wrangle
• whiskeytastingfoundation/wtf-frontend (Add SLSA Source Provenance Workflow whiskeytastingfoundation/wtf-frontend#18)