Add some missing properties on workflow_run events (#2767)

Co-authored-by: Lucas Costi <lucascosti@users.noreply.github.com>

Author: sbrunner

content/developers/webhooks-and-events/webhook-events-and-payloads.md

@@ -1335,9 +1335,8 @@ When a {% data variables.product.prodname_actions %} workflow run is requested o
 
 #### Webhook payload object
 
-Key | Type | Description
-----|------|-------------
-`action` | `string` | Most webhook payloads contain an `action` property that contains the specific activity that triggered the event.
+{% data reusables.webhooks.workflow_run_properties %}
+{% data reusables.webhooks.workflow_desc %}
 {% data reusables.webhooks.org_desc %}
 {% data reusables.webhooks.repo_desc %}
 {% data reusables.webhooks.sender_desc %}

data/reusables/webhooks/workflow_desc.md

@@ -0,0 +1 @@
+`workflow` | `object` | The workflow that generated the workflow run.

data/reusables/webhooks/workflow_run_properties.md

@@ -0,0 +1,4 @@
+Key | Type | Description
+----|------|-------------
+`action`|`string` | The action that was performed. Can be one of `requested` or `completed`.
+`workflow_run`| `object` | The workflow run. Many `workflow_run` keys, such as `head_branch`, `conclusion`, and `pull_requests` are the same as those in a [`check_suite`](#check_suite) object.