chore(deps): update rtcamp/action-slack-notify action to v2.4.0 (#395)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/schema-compatibility-cron.yml

@@ -23,7 +23,7 @@ jobs:
 
       - name: Notify Slack on failure
         if: failure()
-        uses: rtCamp/action-slack-notify@v2.3.3
+        uses: rtCamp/action-slack-notify@v2.4.0
         env:
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
           SLACK_CHANNEL: "#openhexa-alerts"