[DOCS] `coming` instead of `added` for copy_to feature.

docs/reference/mapping/types/core-types.asciidoc

@@ -618,7 +618,7 @@ The following Similarities are configured out-of-box:
 [float]
 ===== Copy to field
 
-added[1.0.0.RC2]
+coming[1.0.0.RC2]
 
 Adding `copy_to` parameter to any field mapping will cause all values of this field to be copied to fields specified in
 the parameter. In the following example all values from fields `title` and `abstract` will be copied to the field