correct fonts filepath

app.py

@@ -35,7 +35,7 @@ if st.session_state.clicked:
     st.divider()
     
     # setup fonts for display mandarin characters
-    font_file = "./jf-openhuninn-2.0.ttf"  # The path to the custom font file.
+    font_file = "./fonts/jf-openhuninn-2.0.ttf"  # The path to the custom font file.
     font_manager.fontManager.addfont(font_file)
     matplotlib.rcParams['font.family'] = ['jf-openhuninn-2.0', 'sans-serif']