docs/zh_CN: Add a new translation of reporting-regressions.rst

Last English version used:

commit d2b40ba2 ("docs: *-regressions.rst: explain how quickly
issues should be handled")
Signed-off-by: Wu XiangCheng <bobwxc@email.cn>
Reviewed-by: Yanteng Si<siyanteng@loongson.cn>
Link: https://lore.kernel.org/r/YsbuDGIpUjOzfAAh@bobwxc.mipcSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/admin-guide/index.rst

@@ -36,6 +36,7 @@ Todolist:
    :maxdepth: 1
 
    reporting-issues
+   reporting-regressions
    security-bugs
    bug-hunting
    bug-bisect
@@ -44,7 +45,6 @@ Todolist:
 
 Todolist:
 
-*   reporting-bugs
 *   ramoops
 *   dynamic-debug-howto
 *   kdump/index