Fix broken link

Author: greenberga

docs/sdk/configuration.md

@@ -45,7 +45,7 @@ Example:
 ```
 
 ### `data-api-endpoint`
-*Only relevant if you are using our [dedicated EU endpoint service](/)*.
+*Only relevant if you are using our [dedicated EU endpoint service](../guides/eu-endpoint.md)*.
 
 By default the widget fetches puzzles from `https://global.frcapi.com/api/v2/captcha`, which serves puzzles globally. As a premium service we offer an alternative endpoint that serves requests from datacenters in Germany only. You can either specify a URL, `"eu"` or `"global"`.