docs/zh_CN: update the translation of process/email-clients.rst

Update to commit 91031ca ("docs: improve comment consistency in
.muttrc example configuration")

scripts/checktransupdate.py reports:

Documentation/translations/zh_CN/process/email-clients.rst
commit 91031ca ("docs: improve comment consistency in .muttrc
example configuration")
commit 7fe7de7 ("Docs/process/email-clients: Document HacKerMaiL")
commit 9c03bc9 ("Documentation: process: Revert "Document suitability
of Proton Mail for kernel development"")
commit 1d2ed92 ("Documentation: process: Document suitability of
Proton Mail for kernel development")
4 commits needs resolving in total

Signed-off-by: Dongliang Mu <[email protected]>
Reviewed-by: Yanteng Si <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: mudongliang

Documentation/translations/zh_CN/process/email-clients.rst

@@ -197,7 +197,7 @@ Mutt不自带编辑器，所以不管你使用什么编辑器，不自动断行
 Mutt 是高度可配置的。 这里是个使用mutt通过 Gmail 发送的补丁的最小配置::
 
   # .muttrc
-  # ================  IMAP ====================
+  # ================  IMAP  ====================
   set imap_user = '[email protected]'
   set imap_pass = 'yourpassword'
   set spoolfile = imaps://imap.gmail.com/INBOX
@@ -325,3 +325,10 @@ Gmail网页客户端自动地把制表符转换为空格。
 另一个问题是Gmail还会把任何含有非ASCII的字符的消息改用base64编码，如欧洲人的
 名字。
 
+HacKerMaiL (TUI)
+****************
+
+HacKerMaiL (hkml) 是一个基于公共收件箱的简单邮件管理工具，它不需要订阅邮件列表。
+该工具由 DAMON 维护者开发和维护，旨在支持 DAMON 和通用内核子系统的基本开发工作
+流程。详细信息可参考 HacKerMaiL 的 README 文件
+(https://github.com/sjp38/hackermail/blob/master/README.md)。