Update docs for v8.10.3 release (#100432)

Author: masseyke

docs/changelog/99604.yaml

@@ -1,5 +1,5 @@
 pr: 99604
-summary: Show concrete error when enrich index not exist rather than NPE
+summary: Show a concrete error when the enrich index does not exist rather than a NullPointerException
 area: Ingest Node
 type: enhancement
 issues: []

docs/reference/release-notes.asciidoc

@@ -6,6 +6,7 @@
 
 This section summarizes the changes in each release.
 
+* <<release-notes-8.10.3>>
 * <<release-notes-8.10.2>>
 * <<release-notes-8.10.1>>
 * <<release-notes-8.10.0>>
@@ -50,6 +51,7 @@ This section summarizes the changes in each release.
 
 --
 
+include::release-notes/8.10.3.asciidoc[]
 include::release-notes/8.10.2.asciidoc[]
 include::release-notes/8.10.1.asciidoc[]
 include::release-notes/8.10.0.asciidoc[]

docs/reference/release-notes/8.10.3.asciidoc

@@ -0,0 +1,70 @@
+[[release-notes-8.10.3]]
+== {es} version 8.10.3
+
+coming[8.10.3]
+
+Also see <<breaking-changes-8.10,Breaking changes in 8.10>>.
+
+[[bug-8.10.3]]
+[float]
+=== Bug fixes
+
+Aggregations::
+* Fix cardinality agg for `const_keyword` {es-pull}99814[#99814] (issue: {es-issue}99776[#99776])
+
+Distributed::
+* Skip settings validation during desired nodes updates {es-pull}99946[#99946]
+
+Highlighting::
+* Implement matches() on `SourceConfirmedTextQuery` {es-pull}100252[#100252]
+
+ILM+SLM::
+* ILM introduce the `check-ts-end-time-passed` step {es-pull}100179[#100179] (issue: {es-issue}99696[#99696])
+* ILM the delete action waits for a TSDS index time/bounds to lapse {es-pull}100207[#100207]
+
+Ingest Node::
+* Validate enrich index before completing policy execution {es-pull}100106[#100106]
+
+Machine Learning::
+* Adding retry logic for start model deployment API {es-pull}99673[#99673]
+* Using 1 MB chunks for elser model storage {es-pull}99677[#99677]
+
+Search::
+* Close expired search contexts on SEARCH thread {es-pull}99660[#99660]
+* Fix fields API for `geo_point` fields inside other arrays {es-pull}99868[#99868] (issue: {es-issue}99781[#99781])
+
+Snapshot/Restore::
+* Support $ and / in restore rename replacements {es-pull}99892[#99892] (issue: {es-issue}99078[#99078])
+
+Transform::
+* Do not use PIT in the presence of remote indices in source {es-pull}99803[#99803]
+* Ignore "index not found" error when `delete_dest_index` flag is set but the dest index doesn't exist {es-pull}99738[#99738]
+* Let `_stats` internally timeout if checkpoint information can not be retrieved {es-pull}99914[#99914]
+
+Vector Search::
+* Update version range in `jvm.options` for the Panama Vector API {es-pull}99846[#99846]
+
+[[enhancement-8.10.3]]
+[float]
+=== Enhancements
+
+Authorization::
+* Add manage permission for fleet managed threat intel indices {es-pull}99231[#99231]
+
+Highlighting::
+* Implement matches() on `SourceConfirmedTextQuery` {es-pull}100134[#100134]
+
+Ingest Node::
+* Show a concrete error when the enrich index does not exist rather than a NullPointerException {es-pull}99604[#99604]
+
+Search::
+* Add checks in term and terms queries that input terms are not too long {es-pull}99818[#99818] (issue: {es-issue}99802[#99802])
+
+[[upgrade-8.10.3]]
+[float]
+=== Upgrades
+
+Packaging::
+* Upgrade bundled JDK to Java 21 {es-pull}99724[#99724]
+
+