Update app.py

app.py

@@ -23,6 +23,7 @@ def train_dreambooth_blora_sdxl(instance_data_dir, b_lora_trained_folder, instan
         f"--instance_data_dir={instance_data_dir}",
         f"--output_dir={b_lora_trained_folder}",
         f"--instance_prompt='{instance_prompt}'",
+        f"--validation_prompt='a teddy bear in {instance_prompt} style'"
         "--resolution=1024",
         "--rank=64",
         "--train_batch_size=1",