[DOCS] Add 8.14.0 release notes (#2233) (#2236)

(cherry picked from commit f1cb6b2)

Author: jbaiera

docs/src/reference/asciidoc/appendix/release-notes/8.14.0.adoc

@@ -0,0 +1,13 @@
+[[eshadoop-8.14.0]]
+== Elasticsearch for Apache Hadoop version 8.14.0
+
+[[enhancements-5.3.1]]
+=== Enhancements
+* Updating scala, spark, and hadoop to supported versions
+https://github.com/elastic/elasticsearch-hadoop/pull/2215[#2215]
+
+[[bugs-5.3.1]]
+=== Bug Fixes
+REST::
+* Handling a race condition that can happen during index creation
+https://github.com/elastic/elasticsearch-hadoop/pull/2216[#2216]

docs/src/reference/asciidoc/appendix/release.adoc

@@ -9,6 +9,7 @@ This section summarizes the changes in each release.
 [[release-notes-8]]
 ===== 8.x
 
+* <<eshadoop-8.14.0>>
 * <<eshadoop-8.13.4>>
 * <<eshadoop-8.13.3>>
 * <<eshadoop-8.13.2>>
@@ -107,6 +108,7 @@ Elasticsearch 5.3.1.
 
 ////////////////////////
 
+include::release-notes/8.14.0.adoc[]
 include::release-notes/8.13.4.adoc[]
 include::release-notes/8.13.3.adoc[]
 include::release-notes/8.13.2.adoc[]