Cancelled is not a valid value for a conclusion in octo-nudge (#490)

Author: marcin-krystianc

.github/workflows/nudge.yml

@@ -15,4 +15,3 @@ jobs:
         uses: pavlovic-ivan/octo-nudge@v2
         with:
           webhooks: ${{ secrets.NUDGE_WEBHOOKS }}
-          conclusions: failure,cancelled