Update ruleset.xml

VIP's cron setup

https://wpvip.com/blog/wordpress-cron/
https://docs.wpvip.com/wordpress-on-vip/cron-control/

Can handle frequent heavy cron schedules. Increase job frequency does not equate to slower site performance as the jobs are run async on dedicated batch containers, not front end requests.

Author: davidsword

WordPress-VIP-Go/ruleset.xml

@@ -251,5 +251,9 @@
 	<rule ref="WordPress.WP.AlternativeFunctions.file_system_operations_fclose">
 		<severity>0</severity>
 	</rule>
+	<rule ref="WordPress.WP.CronInterval.CronSchedulesInterval">
+		<!-- VIP's cron infrastructure can handle frequent and heavy crons, lower schedule intervals will not slow down the performance of the site -->
+		<severity>0</severity>
+	</rule>
 
 </ruleset>