Update CHANGELOG

Author: jaredmixpanel

CHANGELOG.md

@@ -1,5 +1,13 @@
 #
 
+## [v5.1.1](https://github.com/mixpanel/mixpanel-swift/tree/v5.1.1) (2025-08-06)
+
+### Enhancements
+
+- Add device\_id as an automatic context value for Feature Flags [\#675](https://github.com/mixpanel/mixpanel-swift/pull/675)
+
+#
+
 ## [v5.1.0](https://github.com/mixpanel/mixpanel-swift/tree/v5.1.0) (2025-05-28)
 
 ### Enhancements
@@ -514,6 +522,8 @@ When you call the API `createAlias`, there is an implicit `identify` call inside
 
 
 
+
+