docs/zh_CN: Add keys index Chinese translation

Translate .../security/keys/index.rst into Chinese

Update the translation through commit 5395d31
("doc: ReSTify keys-trusted-encrypted.txt")

Signed-off-by: zhangwei <zhangwei@cqsoftware.com.cn>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/6e55a93d889871a872a3449cb186c28fb38fd3df.1738923258.git.zhangwei@cqsoftware.com.cn

Author: zhangwei

Documentation/translations/zh_CN/security/keys/index.rst

@@ -0,0 +1,22 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ../../disclaimer-zh_CN.rst
+
+:Original: Documentation/security/keys/index.rst
+
+:翻译:
+
+
+========
+内核密钥
+========
+
+.. toctree::
+   :maxdepth: 1
+
+
+TODOLIST:
+* core
+* ecryptfs
+* request-key
+* trusted-encrypted