Update ECE version to 4.0.2 (#1981)

Parent issue for ECE 4.0.2 docs update: elastic/dev#3323

Co-authored-by: Jan Calanog <[email protected]>

Author: kilfoyle

config/versions.yml

@@ -15,7 +15,7 @@ versioning_systems:
   # Ece version updates are manual
   ece:
     base: 4.0
-    current: 4.0.1
+    current: 4.0.2
   ech: *all
   eck:
     base: 3.0