Update app.py

app.py

@@ -25,7 +25,7 @@ from huggingface_hub import InferenceClient
 if not os.path.exists("MarkdownCode.md"):
     with open("MarkdownCode.md", 'w', encoding='utf-8') as f:
         f.write("# Default Markdown\nThis is a default Markdown file.")
-    st.experimental_rerun()
+    st.rerun()
 
 if not os.path.exists("MermaidCode.md"):
     with open("MermaidCode.md", 'w', encoding='utf-8') as f:
@@ -35,7 +35,7 @@ flowchart LR
     click A "/?q=Default" _self
     click B "/?q=Example" _self
 """)
-    st.experimental_rerun()
+    st.rerun()
 
 # ----------------------------
 # Placeholder data structures