Fix image resolution for ghcr

Signed-off-by: Danil Grigorev <danil.grigorev@suse.com>

.github/workflows/release-workflow.yml

@@ -83,7 +83,7 @@ jobs:
       - name: Sign image with cosign
         uses: ./.github/workflows/release_sign
         with:
-          image: ${{ needs.build.outputs.image || format('{0}-{1}', vars[inputs.image], inputs.arch) }}
+          image: ${{ inputs.secret_registry && format('{0}-{1}', vars[inputs.image], inputs.arch) || needs.build.outputs.image }}
           digest: ${{ needs.build.outputs.digest }}
           identity: https://github.com/${{ inputs.org }}/rancher-turtles/.github/workflows/release.yaml@refs/tags/${{ inputs.tag }}
           oids-issuer: https://token.actions.githubusercontent.com
@@ -100,7 +100,7 @@ jobs:
     uses: slsa-framework/slsa-github-generator/.github/workflows/generator_container_slsa3.yml@v1.9.0
     with:
       digest: ${{ needs.build.outputs.digest }}
-      image: ${{ needs.build.outputs.image || format('{0}-{1}', vars[inputs.image], inputs.arch) }}
+      image: ${{ inputs.secret_registry && format('{0}-{1}', vars[inputs.image], inputs.arch) || needs.build.outputs.image }}
     secrets:
       registry-username: ${{ inputs.secret_registry && secrets[inputs.username] || inputs.username }}
       registry-password: ${{ secrets[inputs.password] }}

.github/workflows/release.yaml

@@ -18,17 +18,18 @@ jobs:
       matrix:
         destination: [ghcr, prod]
         arch: [amd64, arm64, s390x]
-        image: [REGISTRY_IMAGE]
         include:
         - destination: ghcr
           registry: ghcr.io
           username: ${{ github.actor }}
           password: GITHUB_TOKEN
+          image: ghcr.io/rancher-sandbox/rancher-turtles
           secret_registry: false
         - destination: prod
           registry: REGISTRY_ENDPOINT
           username: REGISTRY_USERNAME
           password: REGISTRY_PASSWORD
+          image: REGISTRY_IMAGE
           secret_registry: true
     name: Release
     uses: ./.github/workflows/release-workflow.yml