indent fix

app.py

@@ -173,8 +173,8 @@ with gr.Blocks(css=css) as demo:
         question = gr.Textbox(label="Question", placeholder="Type your question and hit Enter")
         submit_btn = gr.Button("Send Message")
 
-      load_pdf.click(loading_pdf, None, langchain_status, queue=False)
-      load_pdf.click(pdf_changes, inputs=[pdf_doc], outputs=[langchain_status], queue=False).then(
+        load_pdf.click(loading_pdf, None, langchain_status, queue=False)
+        load_pdf.click(pdf_changes, inputs=[pdf_doc], outputs=[langchain_status], queue=False).then(
           update_summary_box
       )