Docs: Set the stack version to 6.7

nik9000 · nik9000 · commit 352a2c36526f · 2019-03-29T11:23:53.000-04:00
diff --git a/docs/index.asciidoc b/docs/index.asciidoc
@@ -1,6 +1,6 @@
 = @elastic/elasticsearch
 
-:branch: 6.x
+:branch: 6.7
 include::{asciidoc-dir}/../../shared/attributes.asciidoc[]
 
 include::introduction.asciidoc[]
