Merge pull request mendix#6532 from HasanK23/update_release_notes

updated the release notes

Author: MarkvanMents

content/en/docs/releasenotes/deployment/mendix-cloud.md

@@ -17,6 +17,13 @@ For information on the current status of deployment to Mendix Cloud and any plan
 
 ## 2023
 
+
+### September 19, 2023
+
+#### Improvements
+
+* We introduced a timeout limit for Free Apps where idle connections are actively running a transaction. This change enhances system efficiency by automatically releasing resources from idle, ongoing, transactions to optimize overall performance.
+
 ### September 18, 2023
 
 #### Improvements