Fix ddtags missing backtick in Datadog

pipeline/outputs/datadog.md

@@ -23,7 +23,7 @@ Before you begin, you need a [Datadog account](https://app.datadoghq.com/signup)
 | tag_key         | The key name of tag. If `include_tag_key` is false, This property is ignored.                                                                                                                                                                                                                                                                                                                                                              | `tagkey`                         |
 | dd_service      | _Recommended_ - The human readable name for your service generating the logs (e.g. the name of your application or database). If unset, Datadog will look for the service using [Service Remapper](https://docs.datadoghq.com/logs/log_configuration/pipelines/?tab=service#service-attribute)." |                                  |
 | 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_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 remap the value to the key 'message'. If the property is set, the plugin will search the property name key.                                                                                                                                                                                                                                                                          |                                  |
 | workers | The number of [workers](../../administration/multithreading.md#outputs) to perform flush operations for this output. | `0` |