Improve deprecation warning for Request::here()

src/Http/ServerRequest.php

@@ -957,7 +957,7 @@ class ServerRequest implements ArrayAccess, ServerRequestInterface
     public function here($base = true)
     {
         deprecationWarning(
-            'This method will be removed in 4.0.0. You should use getRequestTarget() instead.'
+            'ServerRequest::here() will be removed in 4.0.0. You should use getRequestTarget() instead.'
         );
 
         $url = $this->here;