Update app.py

app.py

@@ -32,7 +32,7 @@ js_c=("""
 
 #def call_chart(mermaidCode):
 def mm(graph=mermaid_code):
-    out_html=f'<iframe src="https://omnibus-mermaid-script.static.hf.space/index.html?mermaid={graph}"></iframe>'
+    out_html=f'''<div><iframe src="https://omnibus-mermaid-script.static.hf.space/index.html?mermaid={graph}"></iframe></div>'''
     return gr.update(out_html)
 
 """