docs/zh_CN: Add userspace-api/seccomp_filter Chinese translation

Translate the following documents into Chinese:

- userspace-api/seccomp_filter.rst

Also adjust index order according to the original index file.
Signed-off-by: Rui Li <me@lirui.org>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Link: https://lore.kernel.org/r/20221108112921.312071-1-me@lirui.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/userspace-api/index.rst

@@ -24,13 +24,13 @@ Linux 内核用户空间API指南
 .. toctree::
    :maxdepth: 2
 
-   ebpf/index
    no_new_privs
+   seccomp_filter
+   ebpf/index
    sysfs-platform_profile
 
 TODOList:
 
-* seccomp_filter
 * landlock
 * unshare
 * spec_ctrl