docs: 관심사에 Agentic AI 추가, 커뮤니티 활동 기간 명시

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: Dev-HyunSang

src/data/intro.md

@@ -4,11 +4,12 @@
 ### What I’m interested in
 
 - Backend Development Using Golang and Nest(TypeScript)
-- DevSecOps(Kubernetes, AWS, Azure, GitHub Action, ETC)
-- Web Vulnerability Research / Data Privacy(GDPR, Law, ETC)
+- DevSecOps - Kubernetes, AWS, Azure, GitHub Action, ETC
+- Web Vulnerability Research / Data Privacy - GDPR, Law, ETC
+- Agentic AI(Claude Code · Codex) - Code Optimization, Clean Code
 
-### Contributed by
+### Community Contributed by
 
-- [GDG Golang Korea](https://gdg.community.dev/gdg-golang-korea/)
+- [GDG Golang Korea](https://gdg.community.dev/gdg-golang-korea/) (2023.02 ~ 2024.02)
     - [GopherCon Korea 2023](https://2023.gophercon.kr/)
-- [PyCon Korea 2026](https://2026.pycon.kr)
+- [PyCon Korea 2026](https://2026.pycon.kr) (2026.03 ~ Current)