[PATCH] doc: zh_CN: use doc reference to resolve undefined label warning

[Lukas Bulwahn]

Documentation generation warns:

  Documentation/translations/zh_CN/filesystems/debugfs.rst:5:
  WARNING: undefined label: debugfs_index

Use doc reference for files rather than introducing a label to refer to.
This resolves the warning above.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
---
Jonathan, please pick this quick warning fix.

applies on your doc-next and next-20200529

 Documentation/translations/zh_CN/filesystems/debugfs.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/translations/zh_CN/filesystems/debugfs.rst b/Documentation/translations/zh_CN/filesystems/debugfs.rst
index f8a28793c277..822c4d42fdf9 100644
--- a/Documentation/translations/zh_CN/filesystems/debugfs.rst
+++ b/Documentation/translations/zh_CN/filesystems/debugfs.rst
@@ -2,7 +2,7 @@
 
 .. include:: ../disclaimer-zh_CN.rst
 
-:Original: :ref:`Documentation/filesystems/debugfs.txt <debugfs_index>`
+:Original: :doc:`../../../filesystems/debugfs`
 
 =======
 Debugfs
-- 
2.17.1