[DOCS] Updates documentation version (#1305)

Co-Authored-By: Jake Landis <jake.landis@elastic.co>

Author: lcawl

docs/src/reference/asciidoc/index.adoc

@@ -11,9 +11,9 @@
 :ey:	Elasticsearch on YARN
 :ref:  	http://www.elastic.co/guide/en/elasticsearch/reference/5.0
 :description: Reference documentation of {eh}
-:ver:	6.8.0
-:ver-d: 6.8.1.BUILD-SNAPSHOT
-:es-v:	6.8.0
+:ver:	6.8.1
+:ver-d: 6.8.2.BUILD-SNAPSHOT
+:es-v:	6.8.1
 :sp-v:	2.2.0
 :st-v:	1.0.1
 :pg-v:	0.15.0