Update app.py

Updated the transformers version for compatibility

app.py

@@ -1,6 +1,6 @@
 import os
 
-os.system("python -m pip install transformers")
+os.system("python -m pip install transformers==4.26.1")
 os.system("python -m pip install spacy==3.5.4")
 os.system("python -m pip install spacy-alignments==0.9.1")
 os.system("python -m pip install spacy-legacy==3.0.12")