doc: fix ESM JSON/data URL import example

Trott · web-flow · commit a058cefe2963 · 2022-04-14T12:24:20.000+01:00
PR-URL: nodejs#42728 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Beth Griggs <bgriggs@redhat.com>
diff --git a/doc/api/esm.md b/doc/api/esm.md
@@ -200,7 +200,7 @@ URLs being used is:
 
 ```js
 import 'data:text/javascript,console.log("hello!");';
-import _ from 'data:application/json,"world!"';
+import _ from 'data:application/json,"world!"' assert { type: 'json' };
 ```
 
 #### `node:` Imports
