Add note (#5366)

Author: jpipkin1

blog-cse/2025-05-09-content.md

@@ -21,6 +21,9 @@ This release includes:
 
 Changes are enumerated below.
 
+:::warning attention
+We are currently aware of a synchronization issue with updated and new rules not appearing with the specified changes and are working to address the issue ASAP.
+:::
 
 ### Rules
 - [New] OUTLIER-S00033 AWS DynamoDB Outlier in PutItem Events from User