Update app.py

app.py

@@ -18,7 +18,7 @@ class GUI:
         chapter_titles = epub2txt.content_titles
         title = epub2txt.title
         return gr.update(
-            f"# {title}\n\n" + "\n\n".join(
+            value=f"# {title}\n\n" + "\n\n".join(
                 [f"## {ct}\n\n{c}" for ct, c in zip(chapter_titles, ch_list)]))
 
     def hello(self, profile: gr.OAuthProfile | None):