Update kittens-specific.md

Hi.
I've added 'api' into `GET http://example.com/api/kittens/<ID>` (line 64)

Author: Dmytro-Kozachok

exampleSite/content/kittens-specific.md

@@ -61,7 +61,7 @@ This endpoint retrieves a specific kitten.
 
 ### HTTP Request
 
-`GET http://example.com/kittens/<ID>`
+`GET http://example.com/api/kittens/<ID>`
 
 ### URL Parameters