docs: fix ECS versioning (#593)

bmorelli25 · web-flow · commit 1b8c834862c1 · 2019-09-18T16:25:20.000+02:00
diff --git a/docs/index.asciidoc b/docs/index.asciidoc
@@ -1,5 +1,7 @@
 :branch: current
 :server-branch: 6.5
+:ecs_version: current
+
 include::{asciidoc-dir}/../../shared/attributes.asciidoc[]
 
 ifdef::env-github[]
