chore: update Flutter CHANGELOG for 3.0.2

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: dannyhaak

sdk/flutter/tag_data_translation/CHANGELOG.md

@@ -1,6 +1,11 @@
+## 3.0.2
+
+- AOT-safe JSON serialization (source-generated JsonSerializerContext)
+- CI pipeline fixes
+
 ## 3.0.0
 
-- Initial pub.dev release
+- Initial release
 - dart:ffi bindings to NativeAOT-compiled TagDataTranslation library
 - Supports all GS1 EPC schemes: SGTIN-96, SGTIN-198, SSCC-96, SGLN, GRAI, GIAI, GSRN, GDTI, SGCN
 - TDS 2.3 '+' and '++' scheme support with GS1 Digital Link URIs