add workbooks section to limits

Author: austinmccollum

articles/sentinel/sentinel-service-limits.md

@@ -48,6 +48,10 @@ This article lists the most common service limits you might encounter as you use
 
 [!INCLUDE [sentinel-service-limits](../../includes/sentinel-limits-watchlists.md)]
 
+## Workbook limits
+
+[!INCLUDE [sentinel-service-limits](../../includes/sentinel-limits-workbooks.md)]
+
 ## Next steps
 
 - [Azure subscription and service limits, quotas, and constraints](../azure-resource-manager/management/azure-subscription-service-limits.md)