updated app.py Input

https://huggingface.co/spaces/fffiloni/langchain-chat-with-pdf/blob/main/app.py

app.py

@@ -22,12 +22,10 @@ Upload your pdf, ask your questions and wait for the magic to happen.
 DISCLAIMER: I do no have idea what happens to the pdfs that you upload and who has access to them so make sure there is nothing confidential there. 
 """
 title = "QA answering from a pdf."
-
+pdf_doc=gr.File(label="Load a pdf", file_types=['.pdf'], type="file")
 iface = gr.Interface(
     fn=predict,
-    inputs=[
-        gr.inputs.File(),
-    ],
+    inputs=[pdf_doc],
     outputs="text",
     description=description,
     title=title,