Enhancement: Add SLSA provenance to GHCR container images Restic's GitHub Container Registry (GHCR) image build workflow now includes SLSA (Supply-chain Levels for Software Artifacts) provenance generation. Please see the restic documentation for more information about verifying SLSA provenance. https://github.com/restic/restic/issues/4983 https://github.com/restic/restic/pull/4999