Add link to Workflows API (#26730)

* Add link to Workflows API

* word change

content/en/service_management/workflows/build.md

@@ -166,6 +166,10 @@ Edit a workflow in JSON by clicking **Edit JSON Spec** on your workflow page. Th
 - **Format JSON**: Beautify your JSON.
 - **Export JSON**: Download the workflow.
 
+## Interact with workflows using the API
+
+To perform tasks using the API, see the [Workflow Automation API documentation][13].
+
 ## Further reading
 
 {{< partial name="whats-next/whats-next.html" >}}
@@ -183,4 +187,5 @@ Edit a workflow in JSON by clicking **Edit JSON Spec** on your workflow page. Th
 [9]: /account_management/teams/
 [10]: https://datadoghq.slack.com/
 [11]: /service_management/workflows/test_and_debug/#test-a-step
-[12]: /service_management/workflows/variables/
+[12]: /service_management/workflows/variables/
+[13]: /api/latest/workflow-automation/