Updated the release date

Author: NicoletaComan

content/en/docs/releasenotes/developer-portal/_index.md

@@ -21,7 +21,7 @@ To see the current status of the Mendix Portal, see [Mendix Status](https://stat
 
 ## 2025
 
-### June 29, 2025
+### July 8, 2025
 
 #### New Features