Remove extra space in "Regenerate" button label

The extra space before the text of the "Regenerate" button, indicated by a refresh symbol, has been removed to maintain consistent formatting and clear display.

app.py

@@ -333,7 +333,7 @@ with gr.Blocks(
                 components=chatbots + states + show_models + [conversation_id],
             )
             regenerate_btn = gr.Button(
-                value="🔄  Regenerate", interactive=False, elem_id="regenerate_btn"
+                value="🔄 Regenerate", interactive=False, elem_id="regenerate_btn"
             )
             share_twitter_btn = gr.Button(
                 value="Share success on Twitter",