Merge pull request DataDog#513 from DataDog/sadipgiri/unbound-link-up…

…date

[DOC] Corrected link for sample unbound.d/conf.yaml file

unbound/README.md

@@ -56,7 +56,7 @@ Need help? Contact [Datadog support][9].
 [2]: https://docs.datadoghq.com/agent
 [3]: https://docs.datadoghq.com/developers/integrations/new_check_howto/#developer-toolkit
 [4]: https://app.datadoghq.com/account/settings#agent
-[5]: https://github.com/DataDog/integrations-core/blob/master/unbound/datadog_checks/unbound/data/conf.yaml.example
+[5]: https://github.com/DataDog/integrations-extras/blob/master/unbound/datadog_checks/unbound/data/conf.yaml.example
 [6]: https://docs.datadoghq.com/agent/guide/agent-commands/#start-stop-and-restart-the-agent
 [7]: https://docs.datadoghq.com/agent/guide/agent-commands/#agent-status-and-information
 [8]: https://github.com/DataDog/integrations-extras/blob/master/unbound/metadata.csv