Update requirements.txt

requirements.txt

@@ -2,7 +2,7 @@
 # torchvision>=0.19.0
 opencv-python>=4.9.0.80
 diffusers>=0.31.0
-transformers>=4.49.0
+transformers==4.49.0
 tokenizers>=0.20.3
 accelerate>=1.1.1
 tqdm