docs: update changelog

Author: kazupon

CHANGELOG.md

@@ -4,13 +4,11 @@ This changelog is generated by [GitHub Releases](https://github.com/intlify/vue-
 
 <!-- Release notes generated using configuration in .github/release.yml at v9.14.3 -->
 
-**Full Changelog**: https://github.com/intlify/vue-i18n/compare/v9.14.2...v9.14.3
-
-# v9.14.3 (2025-03-07T03:21:38Z)
+## What's Changed
 
-This changelog is generated by [GitHub Releases](https://github.com/intlify/vue-i18n/releases/tag/v9.14.3)
+### 🔒 Security Fixes
 
-<!-- Release notes generated using configuration in .github/release.yml at v9.14.3 -->
+- fix: prototype pollution in `handleFlatJson`, about details see https://github.com/intlify/vue-i18n/security/advisories/GHSA-p2ph-7g93-hw3m
 
 **Full Changelog**: https://github.com/intlify/vue-i18n/compare/v9.14.2...v9.14.3