Merge pull request OAI#1582 from taxpon/fix-typo-in-example

Fix typo in example

Author: darrelmiller

examples/v3.0/petstore.yaml

@@ -23,7 +23,7 @@ paths:
             format: int32
       responses:
         '200':
-          description: An paged array of pets
+          description: A paged array of pets
           headers:
             x-next:
               description: A link to the next page of responses