Update requirements.txt

requirements.txt

@@ -1,3 +1,4 @@
 gradio==4.21.0
-torch==2.5.1
-transformers
+transformers==4.40.2          # ≥4.40 works fine with Llama 3.1
+accelerate==0.30.0            # gives device_map="auto"
+torch==2.5.1                  # CPU wheel; fits the supported list