Patreon button fix

README.md

@@ -131,4 +131,4 @@ Daniel Tarsky, James D Eberhart, Koala Koa, MiSTerFPGA.co.uk, Tony Escobar, turb
 
 Thank you so much for supporting this project! If you would like to show up here, join us as **Supporter+** on Patreon:
 
-<a href="https://www.patreon.com/bePatron?u=37499475"><img src="https://camo.githubusercontent.com/2b7105015397da52617ce6775a339b0b99d689d6f644c2ce911c5d472362bcbd/68747470733a2f2f63352e70617472656f6e2e636f6d2f65787465726e616c2f6c6f676f2f6265636f6d655f615f706174726f6e5f627574746f6e2e706e67"></img></a>
+<a href="https://www.patreon.com/bePatron?u=37499475"><img src="https://slrowland.com/wp-content/uploads/2018/02/patreonsupport.png"></img></a>