Update README.md

Author: hyperlogic

README.md

@@ -6,4 +6,4 @@ A minimal OpenXR example program.
 A standalone file written in c-like c++ with minimal dependencies.
 It displays the 1968 "Sword of Damocles" room using OpenGL.
 
-![Image of Room](https://hyperlogic.github.com/openxrstub/img/openxrstub.png)
+![Image of Room](https://github.com/hyperlogic/openxrstub/blob/main/img/openxrstub.png)