Add 8.5.2 release notes (#91797) (#91826)

Add 8.5.2 release notes

(cherry picked from commit 63fa4184ec1965c3223ce15dd618c3c508de1162)

docs/reference/release-notes.asciidoc

@@ -7,6 +7,7 @@
 This section summarizes the changes in each release.
 
 * <<release-notes-8.7.0>>
+* <<release-notes-8.5.2>>
 * <<release-notes-8.5.1>>
 * <<release-notes-8.5.0>>
 * <<release-notes-8.4.3>>
@@ -36,6 +37,7 @@ This section summarizes the changes in each release.
 --
 
 include::release-notes/8.7.0.asciidoc[]
+include::release-notes/8.5.2.asciidoc[]
 include::release-notes/8.5.1.asciidoc[]
 include::release-notes/8.5.0.asciidoc[]
 include::release-notes/8.4.3.asciidoc[]

docs/reference/release-notes/8.5.2.asciidoc

@@ -0,0 +1,39 @@
+[[release-notes-8.5.2]]
+== {es} version 8.5.2
+
+
+Also see <<breaking-changes-8.5,Breaking changes in 8.5>>.
+
+[[bug-8.5.2]]
+[float]
+=== Bug fixes
+
+Authorization::
+* Avoid potential unsupported operation exception in doc bitset cache {es-pull}91490[#91490]
+
+EQL::
+* Refine bwc version checks on `EqlSearchRequest` {es-pull}91510[#91510]
+
+Health::
+* SLM uneahlthy policies diagnosis recommends correct URL in action {es-pull}91506[#91506]
+
+Ingest Node::
+* Refactor `DatabaseNodeService` as a cluster state listener {es-pull}91567[#91567] (issue: {es-issue}86999[#86999])
+
+Stats::
+* Fix NPE in IndexService getNodeMappingStats {es-pull}91334[#91334] (issue: {es-issue}91259[#91259])
+
+Transform::
+* Fix failure when resolving indices from CCS {es-pull}91622[#91622] (issue: {es-issue}91550[#91550])
+
+[[enhancement-8.5.2]]
+[float]
+=== Enhancements
+
+EQL::
+* Remove version limitations for CCS {es-pull}91409[#91409]
+
+Ingest Node::
+* Refactor enrich maintenance coordination logic {es-pull}90931[#90931]
+
+