update changelog.md

Author: orangecola

CHANGELOG.md

@@ -19,6 +19,7 @@
 - Add support for `data_view_id` in the `elasticstack_kibana_slo` resource ([#1305](https://github.com/elastic/terraform-provider-elasticstack/pull/1305))
 - Add support for `unenrollment_timeout` in `elasticstack_fleet_agent_policy` ([#1169](https://github.com/elastic/terraform-provider-elasticstack/issues/1169))
 - Handle default value for `allow_restricted_indices` in `elasticstack_elasticsearch_security_api_key` ([#1315](https://github.com/elastic/terraform-provider-elasticstack/pull/1315))
+- Add support for `agent_policy_ids` in `elasticstack_fleet_integration_policy` ([#1131](https://github.com/elastic/terraform-provider-elasticstack/pull/1311))
 
 ## [0.11.17] - 2025-07-21