Allow Python 3.8 to be detected
Allow Python 3.8 to be detected

Adds python 3.8 to the list of python 3 versions. 

Thank you so much for renderdoc!!
Zorro666/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc