Update release-highlights.asciidoc

Author: l-trotta

docs/release-notes/release-highlights.asciidoc

@@ -62,9 +62,9 @@ UpdateRequest updateRequest = UpdateRequest.of(u -> u
 ----
 UpdateRequest updateRequest = UpdateRequest.of(u -> u
     .script(s -> s
-            .lang(ScriptLanguage.Painless)
-            .source("my-script")
-            .params(params)
+        .lang(ScriptLanguage.Painless)
+        .source("my-script")
+        .params(params)
     )
 );
 ----