[DOCS] Added 'fail_on_unsupported_field' param to MLT. Closes elastic…

…#28008

docs/reference/query-dsl/mlt-query.asciidoc

@@ -244,7 +244,7 @@ The syntax is the same as the <<query-dsl-minimum-should-match,minimum should ma
 `fail_on_unsupported_field`::
 Controls whether the query should fail (throw an  exception) if any of the 
 specified fields are not of the supported types
-(`text` or `keyword'). Set this to `false` to ignore the error and continue
+(`text` or `keyword'). Set this to `false` to ignore the field and continue
 processing. Defaults to
 `true`.