update changelog [skip ci]

resources/misc/changelogs/en/5.0.0.md

@@ -43,6 +43,7 @@
 - New "Plugins Management" page.
 - "Choose Player" Dialog won't be showed if no texture is selected at closet page.
 - Make "CSRF token mismatched" error friendly.
+- Reduced times of sending verification email.
 
 ## Fixed
 

resources/misc/changelogs/zh_CN/5.0.0.md

@@ -43,6 +43,7 @@
 - 新的「插件管理」页面
 - 衣柜中未选择材质时点击「应用到角色」不弹出「选择角色」对话框
 - 使 "CSRF token mismatched" 的错误提示变得友好
+- 减少发送验证邮件的次数
 
 ## 修复