minor: Update Changes

Author: xdg

Changes

@@ -17,6 +17,8 @@ Release notes for HTTP-Tiny
  - Sends Content-Length: 0 on empty body PUT/POST. This is not in the spec,
  but some servers require this.
 
+ - Allows optional status line reason, as clarified in RFC 7230.
+
  [DOCS]
 
  - Clarified that exceptions/errors result in 599 status codes.