Update requirements.txt

requirements.txt

@@ -2,4 +2,5 @@ transformers==4.40.0
 torch==2.2.1
 accelerate==0.29.2
 gradio==4.26.0
-bitsandbytes==0.43.0  # For quantization (if needed)
+flash-attn>=2.5.6  # <-- Critical addition
+bitsandbytes==0.43.0  # Optional for quantization