[DOCS] Add 7.17.6 release notes (#1991)

Author: masseyke

docs/src/reference/asciidoc/appendix/release-notes/7.17.6.adoc

@@ -0,0 +1,10 @@
+[[eshadoop-7.17.6]]
+== Elasticsearch for Apache Hadoop version 7.17.6
+
+[[enhancements-7.17.6]]
+=== Enhancements
+Build::
+* Backport Gradle 7.5.1 build support to 7.17
+https://github.com/elastic/elasticsearch-hadoop/pull/1986[#1986]
+* Fixing Java 17 support after Gradle 7.5.1 upgrade
+https://github.com/elastic/elasticsearch-hadoop/pull/1987[#1987]

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

@@ -9,6 +9,7 @@ This section summarizes the changes in each release.
 [[release-notes-7]]
 ===== 7.x
 
+* <<eshadoop-7.17.6>>
 * <<eshadoop-7.17.5>>
 * <<eshadoop-7.17.4>>
 * <<eshadoop-7.17.3>>
@@ -118,6 +119,7 @@ http://github.com/elastic/elasticsearch-hadoop/issues/XXX[#XXX]
 
 ////////////////////////
 
+include::release-notes/7.17.6.adoc[]
 include::release-notes/7.17.5.adoc[]
 include::release-notes/7.17.4.adoc[]
 include::release-notes/7.17.3.adoc[]