Added link

Signed-off-by: Jesse Szwedko <[email protected]>

Author: jszwedko

pipeline/outputs/datadog.md

@@ -25,7 +25,7 @@ Before you begin, you need a [Datadog account](https://app.datadoghq.com/signup)
 | dd_source       | _Recommended_ - A human readable name for the underlying technology of your service (e.g. `postgres` or `nginx`). If unset, Datadog will look for the source in the [`ddsource` attribute](https://docs.datadoghq.com/logs/log_configuration/pipelines/?tab=source#source-attribute).                                                                                                                                                                                                                                                                                                                   |                                  |
 | dd_tags         | _Optional_ - The [tags](https://docs.datadoghq.com/tagging/) you want to assign to your logs in Datadog. If unset, Datadog will look for the tags in the [`ddtags' attribute](https://docs.datadoghq.com/api/latest/logs/#send-logs).                                                                                                                                                                                                                                                                                                                                   |                                  |
 | dd_message_key  | By default, the plugin searches for the key `log` and remaps the value to the key `message`. If the property is set, the plugin searches the property name key. | _none_ |
-| dd_hostname     | The host the emitted logs should be associated with. If unset, Datadog expects the host to be set with `host`, `hostname`, or `syslog.hostname` attributes. See Datadog Logs preprocessor documentation for recognized attributes. | _none_ |
+| dd_hostname     | The host the emitted logs should be associated with. If unset, Datadog expects the host to be set with `host`, `hostname`, or `syslog.hostname` attributes. See [Datadog Logs preprocessor documentation](https://docs.datadoghq.com/logs/log_configuration/pipelines/?tab=host#preprocessing) for recognized attributes. | _none_ |
 
 ### Configuration File