use relative path in doc

docs/contents/secrets/usage.md

@@ -36,7 +36,7 @@ missing from the Arkindex instance.
    ```
 
 For more information on the `.arkindex.yml` file,
-see [YAML configuration](@/workers/yaml.md).
+see [YAML configuration](../workers/yaml.md).
 
 ## Accessing secrets in Python code