feat(crons): Add Next Steps for alerting (#6076)

Author: evanpurkhiser

src/docs/product/crons/getting-started.mdx

@@ -93,3 +93,7 @@ To verify that everything is set up correctly make sure that you are receiving r
 ![Example Recent Monitor Check-In](cron-recent-checkin.png)
 
 If your own cron monitor isn't producing "ok" check-ins even when running as expected, consult the [troubleshooting](/product/crons/troubleshooting/) section.
+
+## Next Steps
+
+- **[Setup alerting for missed checkins](../alerts/)**