Add transformers version constraint to pip install command (#4)

- Add transformers version constraint to pip install command (f1a0bf058355e29afbddef55503a3876578f5080)


Co-authored-by: Matt Russell <[email protected]>

README.md

@@ -68,8 +68,11 @@ Evaluation scores were produced using the python libraries [SacreBLEU](https://g
 
 Ensure you have the prerequisite python libraries installed:
 
-```bsdh
-pip install transformers sentencepiece
+```bash
+# The constraint imposed on the transformers version below
+# is due to the following issue:
+#    https://github.com/huggingface/transformers/issues/26271
+pip install sentencepiece "transformers>4.26.1<=4.30.2"
 ```
 
 ```python