Add patch release information

Author: charlotte-hoblik

docs/release-notes/known-issues.md

@@ -8,8 +8,10 @@ mapped_pages:
 Known issues are significant defects or limitations that may impact your implementation. These issues are actively being worked on and will be addressed in a future release. Review the Elasticsearch known issues to help you make informed decisions, such as upgrading to a new version.
 
 ## 9.0.3 [elasticsearch-9.0.3-known-issues]
-* A bug in the merge scheduler in Elasticsearch 9.0.3 may prevent shards from closing when there isn’t enough disk space to complete a merge. As a result, operations such as closing or relocating an index may hang until sufficient disk space becomes available.
-To mitigate this issue, the disk space checker is disabled by default in `9.0.3` by setting `indices.merge.disk.check_interval` to `0` seconds. Manually enabling this setting is not recommended.
+A bug in the merge scheduler in Elasticsearch 9.0.3 may prevent shards from closing when there isn’t enough disk space to complete a merge. As a result, operations such as closing or relocating an index may hang until sufficient disk space becomes available.
+To mitigate this issue, the disk space checker is disabled by default in 9.0.3 by setting `indices.merge.disk.check_interval` to `0` seconds. Manually enabling this setting is not recommended.
+
+This issue is planned to be fixed in future patch release [#129613](https://github.com/elastic/elasticsearch/pull/129613)
 
 ## 9.0.0 [elasticsearch-9.0.0-known-issues]
 * Elasticsearch on Windows might fail to start, or might forbid some file-related operations, when referencing paths with a case different from the one stored by the filesystem. Windows treats paths as case-insensitive, but the filesystem stores them with case. Entitlements, the new security system used by Elasticsearch, treat all paths as case-sensitive, and can therefore prevent access to a path that should be accessible.