Adds Kibana breaking changes

Author: lcawl

docs/en/install-upgrade/breaking.asciidoc

@@ -24,4 +24,7 @@ Upgrade Assistant provides information about which {dfeeds} need to be updated.
 
 ifdef::asciidoctor-builds[]
 include::{es-repo-dir}/reference/migration/migrate_7_0.asciidoc[tag=notable-breaking-changes]
+
+include::{kib-repo-dir}/migration/migrate_7_0.asciidoc[tag=notable-breaking-changes]
+
 endif::asciidoctor-builds[]

docs/index.asciidoc

@@ -3,6 +3,7 @@
 
 :asciidoctor-builds: true
 :es-repo-dir:        {docdir}/../../elasticsearch/docs
+:kib-repo-dir:       {docdir}/../../kibana/docs
 
 include::{asciidoc-dir}/../../shared/attributes.asciidoc[]
 include::{es-repo-dir}/Versions.asciidoc[]