add missing mapped pages

Author: colleenmcginnis

docs/release-notes/breaking-changes.md

@@ -1,13 +1,15 @@
 ---
 navigation_title: "Breaking changes"
+mapped_pages:
+  - https://www.elastic.co/guide/en/elasticsearch/client/net-api/current/breaking-changes-policy.html
 ---
 
 # Elasticsearch .NET Client breaking changes [elasticsearch-net-client-breaking-changes]
 Breaking changes can impact your Elastic applications, potentially disrupting normal operations. Before you upgrade, carefully review the Elasticsearch .NET Client breaking changes and take the necessary steps to mitigate any issues. To learn how to upgrade, check [Upgrade](docs-content://deploy-manage/upgrade.md).
 
 % ## Next version [elasticsearch-nett-client-nextversion-breaking-changes]
 
-% ::::{dropdown} Title of breaking change 
+% ::::{dropdown} Title of breaking change
 % Description of the breaking change.
 % For more information, check [PR #](PR link).
 % **Impact**<br> Impact of the breaking change.
@@ -16,7 +18,7 @@ Breaking changes can impact your Elastic applications, potentially disrupting no
 
 % ## 9.0.0 [elasticsearch-nett-client-900-breaking-changes]
 
-% ::::{dropdown} Title of breaking change 
+% ::::{dropdown} Title of breaking change
 % Description of the breaking change.
 % For more information, check [PR #](PR link).
 % **Impact**<br> Impact of the breaking change.