Update changelog file

Author: ivo.liondov

CHANGELOG.md

@@ -1,4 +1,11 @@
+## [3.4.1] - (2025-May-09)
+- Support calling Approov from main isolate and any background isolate
+- Performance improvements
+- Allow reinitialization with the same configuration
+- Edge case bug fixes
+- Align major and minor version with native SDK
+
 ## [0.0.5] - (2025-Feb-26)
 - Updated readme. 
 - First published to pub.dev
-- Update iOS native pod package to 3.3.1
+- Update iOS native pod package to 3.3.1