Fix Florence2 conversion script model_type KeyError (#41866)

hopefully fixed florence2_language keyerror

Author: i3hz

src/transformers/models/florence2/convert_florence2_original_pytorch_to_hf.py

@@ -473,6 +473,9 @@ def convert_florence2_checkpoint(hf_model_id, pytorch_dump_folder, output_hub_pa
 
     vision_config = convert_config(hf_config.vision_config.__dict__)
     text_config = hf_config.text_config.__dict__
+    if text_config.get("model_type") == "florence2_language":
+        text_config["model_type"] = "bart"
+
     config = Florence2Config(
         text_config=text_config,
         vision_config=vision_config,