Fix issue caused by llama2->llama renaming (#6310)

Summary: Pull Request resolved: #6310

Reviewed By: kirklandsign

Differential Revision: D64499907

fbshipit-source-id: b5ea566f65678bdba0f9a6032a1c049c5597acdc

Author: mergennachin

examples/models/__init__.py

@@ -16,7 +16,8 @@
     "emformer_transcribe": ("emformer_rnnt", "EmformerRnntTranscriberModel"),
     "emformer_predict": ("emformer_rnnt", "EmformerRnntPredictorModel"),
     "emformer_join": ("emformer_rnnt", "EmformerRnntJoinerModel"),
-    "llama2": ("llama2", "Llama2Model"),
+    "llama2": ("llama", "Llama2Model"),
+    "llama": ("llama", "Llama2Model"),
     "lstm": ("lstm", "LSTMModel"),
     "mobilebert": ("mobilebert", "MobileBertModelExample"),
     "mv2": ("mobilenet_v2", "MV2Model"),