[DOCS] [8.2] Add 8.1.3 release notes (#86001)

* [DOCS] Add 8.1.3 release notes

* Update migrate_8_1.asciidoc

Author: arteam

docs/reference/release-notes.asciidoc

@@ -7,6 +7,7 @@
 This section summarizes the changes in each release.
 
 * <<release-notes-8.2.0>>
+* <<release-notes-8.1.3>>
 * <<release-notes-8.1.2>>
 * <<release-notes-8.1.1>>
 * <<release-notes-8.1.0>>
@@ -21,6 +22,7 @@ This section summarizes the changes in each release.
 --
 
 include::release-notes/8.2.0.asciidoc[]
+include::release-notes/8.1.3.asciidoc[]
 include::release-notes/8.1.2.asciidoc[]
 include::release-notes/8.1.1.asciidoc[]
 include::release-notes/8.1.0.asciidoc[]

docs/reference/release-notes/8.1.3.asciidoc

@@ -0,0 +1,31 @@
+[[release-notes-8.1.3]]
+== {es} version 8.1.3
+
+coming[8.1.3]
+
+Also see <<breaking-changes-8.1,Breaking changes in 8.1>>.
+
+[[bug-8.1.3]]
+[float]
+=== Bug fixes
+
+Authorization::
+* Ignore app priv failures when resolving superuser {es-pull}85519[#85519]
+
+Machine Learning::
+* Avoid multiple queued quantiles documents in renormalizer {es-pull}85555[#85555] (issue: {es-issue}85539[#85539])
+
+Mapping::
+* Do not fail on duplicated content field filters {es-pull}85382[#85382]
+
+Search::
+* Fix skip caching factor with `indices.queries.cache.all_segments` {es-pull}85510[#85510]
+
+Snapshot/Restore::
+* Expose proxy settings for GCS repositories {es-pull}85785[#85785] (issue: {es-issue}84569[#84569])
+
+Watcher::
+* Avoiding watcher validation errors when a data stream points to more than one index {es-pull}85507[#85507] (issue: {es-issue}85508[#85508])
+* Log at WARN level for Watcher cluster state validation errors {es-pull}85632[#85632]
+
+