contrib(win32): get portaudio from github instead of portaudio.com

Change-Id: Ia8ea4818d7966c80be32e44a26d7d84fc4ba008e

contrib/src/portaudio/package.json

 {
     "name": "portaudio",
     "version": "v190600_20161030",
-    "url": "http://www.portaudio.com/archives/pa_stable___VERSION__.tgz",
+    "url": "https://github.com/PortAudio/portaudio/archive/refs/tags/pa_stable___VERSION__.tar.gz",
     "use_cmake" : true,
     "defines": [
         "MSVS=1",