Update nlp.requirements.txt

Author: dciborow

ai-python/fsi/nlp.requirements.txt

@@ -22,7 +22,7 @@ scipy==1.5.4
 sentencepiece==0.1.95
 seqeval==1.2.2
 scikit-learn==0.24.2
-transformers==4.5.0
+transformers==4.9.0
 tqdm==4.46.0
 typing==3.7.4.3; python_version < "3.6"
 uvicorn==0.12.2