Complete the model card provenance and license

app.py

@@ -73,7 +73,10 @@ with gr.Blocks(title="IndexTTS2") as demo:
     build_endpoint(
         model_card=ModelCard(
             name="IndexTTS2",
-            description="Zero-shot speech synthesis with a voice reference and optional emotion reference.",
+            description=(
+                "Zero-shot speech synthesis with a voice reference and optional emotion reference."
+                " Repository: https://github.com/index-tts/index-tts Paper: https://arxiv.org/abs/2506.21619"
+            ),
             author="IndexTeam",
             tags=["text-to-speech", "voice-cloning", "emotion-control"],
         ),