Add date

Author: ConnorLand

content/en/docs/releasenotes/studio-pro/10/10.6.md

@@ -16,6 +16,8 @@ This is the [MTS](/releasenotes/studio-pro/lts-mts/#mts) version 10 release for
 
 ## 10.6.19
 
+**Release date: January 8, 2024**
+
 ### Improvements
 
 - We added a custom runtime setting `DataStorage.OptimizeSecurityColumns` to optimize columns that are added to the SQL generated for retrieve actions to evaluate XPath constraints in entity access rules. (Ticket 229009).