Update example language to more closely match the spec (json-api#1508)

Ivanov-Anton · web-flow · commit ce4306ca8f55 · 2020-08-25T11:04:24.000-04:00
diff --git a/examples/index.md b/examples/index.md
@@ -327,7 +327,7 @@ Content-Type: application/vnd.api+json
 ```
 
 Notice that this response includes not only the `errors` top-level member,
-but the `jsonapi` top-level member. Error responses may not contain the
+but the `jsonapi` top-level member. Error responses cannot contain the
 top-level `data` member, but can include all the other top-level members
 JSON:API defines.
 
