Update auto_update_preview.yml

Attempt to ping @apidx-interrupt  in Slack notification

Author: gricher-crto

.github/workflows/auto_update_preview.yml

@@ -56,7 +56,7 @@ jobs:
         env:
           SLACK_CHANNEL: criteo-api-sdk-generator
           SLACK_COLOR: ${{ job.status }}
-          SLACK_MESSAGE: Autoupdate of OAS in Preview was successful. Please check opened PR to validate the change and publish the artifcacts.
+          SLACK_MESSAGE: Autoupdate of OAS in Preview was successful. Please check opened PRs to validate the change, and publish the artifacts @apidx-interrupt.
           SLACK_USERNAME: sdk-generation-bot
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
           SLACK_FOOTER: 'Autoupdate of OAS in preview runs daily Monday to Tuesday'