Fix project_encoder

vit_gpt2/modeling_flax_vit_gpt2_lm.py

@@ -553,8 +553,10 @@ class FlaxViTGPT2LMForConditionalGeneration(FlaxViTGPT2LMPreTrainedModel):
 
         # instantiate config with corresponding kwargs
         dtype = kwargs.pop("dtype", jnp.float32)
+        project_encoder = kwargs.pop("project_encoder", None)
+
         config = ViTGPT2Config.from_vision_text_configs(
-            vision_model.config, text_model.config, **kwargs
+            vision_model.config, text_model.config, project_encoder=project_encoder, **kwargs
         )
 
         # init model