Update CHANGELOG.md (#1845)

Author: buenaflor

CHANGELOG.md

@@ -14,6 +14,12 @@
     - Method `hint.addAll(Map<String, dynamic> keysAndValues)` now takes `Map<String, dynamic>` instead of `Map<String, Object>`
     - Method `set(String key, dynamic value)` now takes value of `dynamic` instead of `Object`
     - Method `hint.get(String key)` now returns `dynamic` instead of `Object?`
+   
+### Dependencies
+
+- Bump Cocoa SDK from v8.18.0 to v8.19.0 ([#1803](https://github.com/getsentry/sentry-dart/pull/1844))
+  - [changelog](https://github.com/getsentry/sentry-cocoa/blob/main/CHANGELOG.md#8190)
+  - [diff](https://github.com/getsentry/sentry-cocoa/compare/8.18.0...8.19.0)
 
 ## 7.15.0