Merge pull request kubernetes#367 from caiyixiang/modifyLink

modify link

Author: idvoretskyi

external-lb-source-ip-preservation.md

@@ -53,7 +53,7 @@ lot of applications and customer use-cases.
 # Alpha Design
 
 This section describes the proposed design for
-[alpha-level](../../docs/devel/api_changes.md#alpha-beta-and-stable-versions) support, although
+[alpha-level](../devel/api_changes.md#alpha-beta-and-stable-versions) support, although
 additional features are described in [future work](#future-work).
 
 ## Overview