Updates version hints

Author: froschdesign

docs/book/v1/api.md

@@ -75,7 +75,7 @@ Like the `Request` and `ServerRequest`, responses are immutable. Any methods tha
 
 ### HtmlResponse and JsonResponse
 
-- Added in 1.1.0
+> Available since version 1.1.0
 
 The most common use case in server-side applications for generating responses is to provide a string
 to use for the response, typically HTML or data to serialize as JSON.  `Zend\Diactoros\Response\HtmlResponse` and `Zend\Diactoros\Response\JsonResponse` exist to facilitate these use cases:
@@ -130,7 +130,7 @@ $request = RequestFactory::fromGlobals(
 
 ### ServerRequestFactory Helper Functions
 
-- Since 1.8.0
+> Available since version 1.8.0
 
 In order to create the various artifacts required by a `ServerRequest` instance,
 Diactoros also provides a number of functions under the `Zend\Diactoros`

docs/book/v1/custom-responses.md

@@ -60,7 +60,7 @@ Headers must be in the same format as you would provide to the
 
 ## XML Responses
 
-- Since 1.7.0
+> Available since version 1.7.0
 
 `Zend\Diactoros\Response\XmlResponse` allows specifying XML as a payload, and sets the
 `Content-Type` header to `application/xml` by default: