Fixed typo (#25)

Author: ToreMerkely

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

@@ -139,7 +139,7 @@ jobs:
       - name: Debug
         run: |
           echo "### Approval Actor for stage: ${{ steps.get-approver.outputs.approver }}" >> $GITHUB_STEP_SUMMARY
-          cat ${{ steps.get-approver.outputs.approver }} >>  $GITHUB_STEP_SUMMARY
+          cat ${{ steps.get-approver.outputs.approval-json-file }} >>  $GITHUB_STEP_SUMMARY
 
   semver-tag:
     needs: [build,deploy-stage]