docs/zh_CN: Add secrets index Chinese translation

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

Update the translation through commit 7419995
("docs: security: Add secrets/coco documentation")

Signed-off-by: zhangwei <zhangwei@cqsoftware.com.cn>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/57978b69f643c1aacf78804affde4c819960fd3c.1738923258.git.zhangwei@cqsoftware.com.cn

Author: zhangwei

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

@@ -0,0 +1,17 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. include:: ../../disclaimer-zh_CN.rst
+
+:Original: Documentation/security/secrets/index.rst
+
+:翻译:
+
+=====================
+密钥文档
+=====================
+
+.. toctree::
+
+
+TODOLIST:
+
+* coco