Update app.py

app.py

@@ -1,7 +1,7 @@
 import subprocess
 
 subprocess.run('pip install packaging ninja', shell=True)
-subprocess.run('pip install flash-attn --no-build-isolation', env={'FLASH_ATTENTION_SKIP_CUDA_BUILD': "true"}, shell=True)
+subprocess.run('pip install flash-attn --no-build-isolation', env={'FLASH_ATTENTION_SKIP_CUDA_BUILD': "TRUE"}, shell=True)
 
 import os
 from threading import Thread