Update app.py

Change layout budget.

app.py

@@ -410,12 +410,16 @@ def generate(
 init_app()
 
 with gr.Blocks(title="Z-Image Demo") as demo:
-    gr.Markdown("# Z-Image Generation Demo")
     gr.Markdown(
-        """
+        """<div align="center">
+        
+# Z-Image Generation Demo
+
 [![GitHub](https://img.shields.io/badge/GitHub-Z--Image-181717?logo=github&logoColor=white)](https://github.com/Tongyi-MAI/Z-Image)
-An Efficient Image Generation Foundation Model with Single-Stream Diffusion Transformer
-        """
+
+*An Efficient Image Generation Foundation Model with Single-Stream Diffusion Transformer*
+
+</div>"""
     )
 
     with gr.Row():