[azsystemevents] Updating to commit has for release, prepping release (Azure#23975)

Updated commit to release commit (no changes) and prepped release for Tuesday, next week.

Author: richardpark-msft

sdk/messaging/eventgrid/azsystemevents/CHANGELOG.md

@@ -1,6 +1,6 @@
 # Release History
 
-## 0.6.0 (Unreleased)
+## 0.6.0 (2025-01-21)
 
 ### Features Added
 
@@ -14,10 +14,6 @@ The following fields have been added:
 - Azure Media services has been retired - all related system events have been removed. See the [retirement announcement](https://azure.microsoft.com/updates?id=retirement-notice-azure-media-services-is-being-retired-on-30-june-2024) for more details.
 - The following types have been renamed to correct incorrect casing: ACSSMSDeliveryAttemptProperties, ACSSMSDeliveryReportReceivedEventData, ACSSMSReceivedEventData, TypeACSSMSDeliveryReportReceived and TypeACSSMSReceived.
 
-### Bugs Fixed
-
-### Other Changes
-
 ## 0.5.0 (2024-11-19)
 
 ### Features Added

sdk/messaging/eventgrid/azsystemevents/tsp-location.yaml

@@ -1,3 +1,3 @@
 directory: specification/eventgrid/Azure.Messaging.EventGrid.SystemEvents
-commit: 916634165ae4fd5f3a4427696527aa5252bea88e
+commit: c18f249c85d002b7b2ddcc36b648512b574e1f4a
 repo: Azure/azure-rest-api-specs