Fixes ink.

Author: szabosteve

reference/ecs.md

@@ -6,4 +6,4 @@ navigation_title: ECS
 Elastic Common Schema (ECS) defines a common set of fields for ingesting data into Elasticsearch.
 For field details and usage information, refer to [](ecs://reference/index.md).
 
-ECS loggers are plugins for your favorite logging libraries, which help you to format your logs into ECS-compatible JSON. Check out [](ecs://reference/intro.md).
+ECS loggers are plugins for your favorite logging libraries, which help you to format your logs into ECS-compatible JSON. Check out [](ecs://reference/index.md).