Webhook update (smartcontractkit#1664)

* Webhook updates

* Add link

Author: dwightjl

src/content/chainlink-nodes/oracle-jobs/all-jobs.mdx

@@ -402,7 +402,11 @@ See [shared fields](/chainlink-nodes/oracle-jobs/jobs/#shared-fields).
 Webhook jobs can be initiated by HTTP request, either by a user or external initiator.
 
 <Aside type="note">
-  <p>You'll need `FEATURE_WEBHOOK_V2=true` in your `.env` file.</p>
+  <p>
+    You must have `ExternalInitiatorsEnabled = true` in your config to enable these jobs. See{" "}
+    <a href="/chainlink-nodes/v1/node-config#externalinitiatorsenabled">ExternalInitiatorsEnabled</a> in the config
+    reference for details.
+  </p>
 </Aside>
 
 This is an example webhook job: