added link to api doc

Author: eedugon

deploy-manage/deploy/cloud-enterprise/ece-manage-capacity.md

@@ -31,7 +31,7 @@ ECE does not support hot-adding of resources to a running node.  When increasing
 ::::
 
 
-To adjust the allocator capacity prior to ECE 3.5.0, you must reinstall ECE on the host with a new value assigned to the `--capacity` parameter. Starting with ECE 3.5.0, you can update the allocator capacity using the ECE API. After making this change, you must restart the allocator service for it to take effect.
+To adjust the allocator capacity prior to ECE 3.5.0, you must reinstall ECE on the host with a new value assigned to the `--capacity` parameter. Starting with ECE 3.5.0, you can update the allocator capacity using the [allocator settings ECE API](https://www.elastic.co/docs/api/doc/cloud-enterprise/operation/operation-set-allocator-settings). After making this change, you must restart the allocator service for it to take effect.
 
 ```sh
 curl -X PUT \