change notification

Signed-off-by: Leclerc Clement <[email protected]>

.github/workflows/snapshot-ci.yml

@@ -305,7 +305,7 @@ jobs:
             status: custom
             custom_payload: |
               {
-                "text": ":x: *Échec du workflow ${{ github.workflow }}*\n\n*Détails des échecs:*\n${{ needs.build_pypowsybl.outputs.build_status }}\n\nVoir les logs : (https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})"
+                "text": ":x: *Échec du workflow ${{ github.workflow }}*\n\n*Détails des échecs:*\n```${{ needs.build_pypowsybl.outputs.build_status }}```\n\nVoir les logs : (https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})"
               }
           env:
             SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}