update changelog

resources/misc/changelogs/en/5.0.0.md

@@ -70,6 +70,7 @@
 - Fixed that administrator can't add private texture to his/her closet.
 - Fixed that button "See My Upload" existed when user isn't authenticated.
 - Fixed potential "Invalid Signature" issue.
+- Fixed that duplicated player name is not detected when updating player name in administration panel.
 
 ## Removed
 

resources/misc/changelogs/zh_CN/5.0.0.md

@@ -70,6 +70,7 @@
 - 修复管理员不能添加私有材质到衣柜的问题
 - 修复未登录的用户在浏览皮肤库时出现「我的上传」按钮问题
 - 修复可能的「Invalid Signature」问题
+- 修复在管理面板中修改角色名时不检测角色名是否重复的问题
 
 ## 移除