Update run.py

This should fix the runtime error.

run.py

@@ -1,4 +1,4 @@
 import os
 os.system('python download-model.py PygmalionAI/pygmalion-350m --branch main')
 # os.system('python download-model.py waifu-workshop/pygmalion-6b --branch original-sharded')
-os.system('python server.py --cpu --cai-chat --model pygmalion-350m')
+os.system('python server.py --cpu --cai-chat --model PygmalionAI/pygmalion-350m')