Update CHANGELOG for 11.5.0 release

Author: aashishpatil-g

CHANGELOG.md

@@ -1,4 +1,8 @@
 # 11.5.0-beta
+- [added] FriendlyFlix - a comprehensive SwiftUI sample app. 
+- [changed] Switched to using AppCheckInterop APIs to remove hard dependency on FirebaseAppCheck library.
+
+# 11.4.0-beta
 - [added] Support for Swift 6 strict concurrency.
 - [added] Logging within SDKs.
 - [changed] SDK will throw errors if partial GraphQL errors are detected during operation execution.