[DOCS] Fixes directory attributes

Author: lcawl

docs/en/stack/index.asciidoc

@@ -11,10 +11,10 @@
 :blog-ref:          https://www.elastic.co/blog/
 :wikipedia:         https://en.wikipedia.org/wiki
 
-:xkb-repo-dir:      {docdir}/../../../../../kibana/x-pack/docs/en
-:kib-repo-dir:      {docdir}/../../../../../kibana/docs
-:xes-repo-dir:      {docdir}/../../../../../elasticsearch/x-pack/docs/en
-:es-repo-dir:      {docdir}/../../../../../elasticsearch/docs
+:xkb-repo-dir:      {docdir}/../../../../kibana/x-pack/docs/en
+:kib-repo-dir:      {docdir}/../../../../kibana/docs
+:xes-repo-dir:      {docdir}/../../../../elasticsearch/x-pack/docs/en
+:es-repo-dir:      {docdir}/../../../../elasticsearch/docs
 
 include::{asciidoc-dir}/../../shared/versions.asciidoc[]
 include::{asciidoc-dir}/../../shared/attributes.asciidoc[]