Update app.py

app.py

@@ -9,7 +9,7 @@ with gr.Blocks(theme='Hev832/Applio') as demo:
     with gr.Row(equal_height=True):
         with gr.Column(scale=10):
             gr.Markdown(
-                """
+                f"""
                 # Theme preview: `Applio`
                 To use this theme, set `theme='Hev832/Applio'` in `gr.Blocks()` or `gr.Interface()`.
                 You can append an `@` and a semantic version expression, e.g. @>=1.0.0,<2.0.0 to pin to a given version