Fixed trail name for attest artifact (#8)

Author: ToreMerkely

.github/workflows/build-deploy-backend.yml

@@ -18,7 +18,6 @@ env:
   # kosli commands picks up org, flow, trail and api-token from these environment variables
   KOSLI_ORG: kosli-public
   KOSLI_FLOW: github-release-example-backend
-  KOSLI_TRAIL: ${{ github.sha }}
   KOSLI_API_TOKEN: "${{ secrets.KOSLI_PUBLIC_API_TOKEN }}"
   KOSLI_CLI_VERSION: "${{ vars.KOSLI_CLI_VERSION }}"
   KOSLI_TEMPLATE_FILE: "kosli-flow-templates/backend-template.yml"
@@ -62,6 +61,8 @@ jobs:
     outputs:
       image-version: ${{ steps.build-artifact.outputs.image-version }}
       fingerprint: ${{ steps.calculate_fingerprint.outputs.fingerprint }}
+    env:
+      KOSLI_TRAIL: ${{ needs.setup.outputs.kosli-trail }}
     steps:
       - uses: actions/checkout@v4