docs: Update CHANGELOG.md (#239)

# Description

Update the CHANGELOG.md

Author: kmcduffie

CHANGELOG.md

@@ -6,3 +6,10 @@
 ### Features
 
 * Create Agent Payments Protocol (AP2) ([e66fc0b](https://github.com/google-agentic-commerce/AP2/commit/e66fc0b8f3f3c69fbabae721a4c57a18cf28c4b7))
+
+## 0.2.0 (2026-04-28)
+
+
+### Features
+
+* Release of V2 ([b4587ac](https://github.com/google-agentic-commerce/AP2/commit/b4587ac1d055888a73b4b21750973cffba961793))