docs(changelog): 5379 补 author 字段（wx(GIT)）

changelogs-v2/2026-08/03_5379_终止行程车辆退款权威口径-修改接口-管理后台.md

@@ -4,6 +4,7 @@ ticket: "5379"
 title: "终止行程车辆退款改为 Fleet 服务日权威判定"
 consumer: "admin"
 change_type: "修改接口"
+author: "wx(GIT)"
 backend_status: "deployed"
 gateway_status: "verified"
 frontend_status: "claimed"