Update AppVeyor badge in README.md

Fix the non displaying image

Author: segrax

README.md

@@ -1,6 +1,5 @@
 # Open Fodder
-[![Build Status](https://api.travis-ci.com/OpenFodder/openfodder.svg?branch=master)](https://travis-ci.com/OpenFodder/openfodder) [![Build status](https://ci.appveyor.com/api/projects/status/7pc2r2qe4niv4848?svg=true)](https://ci.appveyor.com/project/segrax/openfodder)
-
+[![Build Status](https://api.travis-ci.com/OpenFodder/openfodder.svg?branch=master)](https://travis-ci.com/OpenFodder/openfodder) [![Build status](https://img.shields.io/appveyor/build/segrax/openfodder/master.svg?logo=appveyor)](https://ci.appveyor.com/project/segrax/openfodder)
 
 Come for a chat over at our [Discord](https://discord.gg/4mX2wFM)