Update changelog for release 0.13.5

Updated the changelog for release 0.13.5 to reflect changes in app permissions and tracing improvements.

Author: stacy-qqq

docs/changelog.md

@@ -9,10 +9,12 @@ To use the latest version of Devvit:
 
 **Please note**: you may see features available across Devvit packages that are not documented or noted in our changelog. These are experimental features that are not stable and are subject to change, or removal, from the platform. Please use caution when testing or implementing experimental features.
 
-## Relese 0.13.5: App Permissions Update
+## Relese 0.13.5: Updated App Permissions and Improved Tracing
 **Release Date: June 22, 2026**
 
-App permissions have been updated to indicate that app journey telemetry is being recorded. 
+In this release, app permissions are updated to indicate that app journey telemetry is being recorded. 
+
+Under the hood, we've improved trace propagation between web view and plugin calls. Apps running v0.13.5+ will have more complete traces, providing better observability and simplifying debugging and support.
 
 
 ## Relese 0.13.4: Updated Redis Docs