fix: pin transformers to v4.49.0 to fix ImportError: cannot import name 'AdamW' from 'transformers'

requirements.txt

@@ -22,4 +22,4 @@ tdigest>=0.5.2
 tensorboard>=2.15
 torch>=2.0.1
 tqdm>=4.65
-transformers>=4.40
+transformers==4.49.0