replacing the png with scaling svg

README.md

@@ -2,7 +2,7 @@ Queue
 =====
 
 [![Build Status](https://travis-ci.org/eapache/queue.svg)](https://travis-ci.org/eapache/queue)
-[![GoDoc](https://godoc.org/github.com/eapache/queue?status.png)](https://godoc.org/github.com/eapache/queue)
+[![GoDoc](https://godoc.org/github.com/eapache/queue?status.svg)](https://godoc.org/github.com/eapache/queue)
 [![Code of Conduct](https://img.shields.io/badge/code%20of%20conduct-active-blue.svg)](https://eapache.github.io/conduct.html)
 
 A fast Golang queue using a ring-buffer, based on the version suggested by Dariusz Górecki.