[Model Card] standardize T2I Sdxl model card (#6942)

standardize model card template t2i-sdxl

examples/text_to_image/train_text_to_image_sdxl.py

@@ -48,6 +48,7 @@ from diffusers import AutoencoderKL, DDPMScheduler, StableDiffusionXLPipeline, U
 from diffusers.optimization import get_scheduler
 from diffusers.training_utils import EMAModel, compute_snr
 from diffusers.utils import check_min_version, is_wandb_available
+from diffusers.utils.hub_utils import load_or_create_model_card, populate_model_card
 from diffusers.utils.import_utils import is_xformers_available
 from diffusers.utils.torch_utils import is_compiled_module
 
@@ -77,29 +78,33 @@ def save_model_card(
         image.save(os.path.join(repo_folder, f"image_{i}.png"))
         img_str += f"![img_{i}](./image_{i}.png)\n"
 
-    yaml = f"""
----
-license: creativeml-openrail-m
-base_model: {base_model}
-dataset: {dataset_name}
-tags:
-- stable-diffusion-xl
-- stable-diffusion-xl-diffusers
-- text-to-image
-- diffusers
-inference: true
----
-    """
-    model_card = f"""
+    model_description = f"""
 # Text-to-image finetuning - {repo_id}
 
-This pipeline was finetuned from **{base_model}** on the **{args.dataset_name}** dataset. Below are some example images generated with the finetuned pipeline using the following prompt: {validation_prompt}: \n
+This pipeline was finetuned from **{base_model}** on the **{dataset_name}** dataset. Below are some example images generated with the finetuned pipeline using the following prompt: {validation_prompt}: \n
 {img_str}
 
 Special VAE used for training: {vae_path}.
 """
-    with open(os.path.join(repo_folder, "README.md"), "w") as f:
-        f.write(yaml + model_card)
+
+    model_card = load_or_create_model_card(
+        repo_id_or_path=repo_id,
+        from_training=True,
+        license="creativeml-openrail-m",
+        base_model=base_model,
+        model_description=model_description,
+        inference=True,
+    )
+
+    tags = [
+        "stable-diffusion-xl",
+        "stable-diffusion-xl-diffusers",
+        "text-to-image",
+        "diffusers",
+    ]
+    model_card = populate_model_card(model_card, tags=tags)
+
+    model_card.save(os.path.join(repo_folder, "README.md"))
 
 
 def import_model_class_from_model_name_or_path(