Replace note banner with caution banner for retirement notice

Author: trangl-splunk

admin/notif-services/microsoftteams.rst

@@ -113,7 +113,7 @@ Splunk Observability Cloud sends an alert notification to the Microsoft Teams ch
 Update existing Microsoft Teams integration configurations for Office 365 connectors retirement
 =================================================================================================
 
-.. note:: After December 31, 2024, Office 365 connectors in Microsoft Teams will be retired. 
+.. caution:: After December 31, 2024, Office 365 connectors in Microsoft Teams will be retired. 
 
 To continue using the Microsoft Teams integration in Splunk Observability Cloud without any interruption, follow these steps: