docs: update header gopher pilot image

README.md

@@ -1,6 +1,6 @@
 # [GoServ](https://git.coolaj86.com/coolaj86/goserv)
 
-!["golang gopher with goggles"](https://golang.org/lib/godoc/images/footer-gopher.jpg)
+!["golang gopher with goggles"](https://i.imgur.com/S2nhiRK.jpg)
 
 > Boilerplate for how I like to write a backend web service