FIX [bnb / tests] Propagate the changes from #29092 to 4-bit tests (

#29122)

* forgot to push the changes for 4bit ..

* trigger CI

tests/quantization/bnb/test_4bit.py

@@ -43,7 +43,7 @@
 
 
 def get_some_linear_layer(model):
-    if model.config.model_type == "openai-community/gpt2":
+    if model.config.model_type == "gpt2":
         return model.transformer.h[0].mlp.c_fc
     elif model.config.model_type == "opt":
         try: