feat(crons): Add Redbeat as supported scheduler (#9479)

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Co-authored-by: vivianyentran <[email protected]>

Author: sentrivana

docs/platforms/python/integrations/celery/crons.mdx

@@ -66,7 +66,7 @@ Once Sentry Crons is set up, tasks in your Celery beat schedule will be auto-dis
 
 Start your Celery beat and worker services and see your tasks being monitored at [https://sentry.io/crons/](https://sentry.io/crons/).
 
-Currently, only the default scheduler of Celery Beat is officially supported. Other schedulers (like `RedBeat`) are not supported.
+In addition to the default Celery Beat scheduler, we also support [Redbeat](https://redbeat.readthedocs.io/en/latest).
 
 <Note>