New translations group_request.html (Chinese Simplified)

library/language/zh/email/group_request.html

@@ -1,7 +1,9 @@
-亲爱的{GROUP_MODERATOR},
+Subject: A request to join your group has been made
 
-用户{USER}已经请求加入的一个组主持人在{SITENAME}的。
+Dear {GROUP_MODERATOR},
-批准或拒绝这一用户的请求，请访问以下链接：
+
+A user {USER} has requested to join a group you moderator on {SITENAME}.
+To approve or deny this request for group membership please visit the following link:
 
 {U_GROUP}