some changes has been done

app.py

@@ -72,7 +72,7 @@ def handle_userinput(user_question):
 
 def main():
 
-    st.set_page_config(page_title='Chat with PDF', page_icon=':rocket:', layout='wide', )
+    st.set_page_config(page_title='Java Copilot :Coffe:', page_icon=':rocket:', layout='wide', )
     with st.sidebar.title(':gear: Parameters'):
         model_n_ctx = st.sidebar.slider('Model N_CTX', min_value=128, max_value=2048, value=1024, step=2)
         model_n_batch = st.sidebar.slider('Model N_BATCH', min_value=1, max_value=model_n_ctx, value=512, step=2)
@@ -87,10 +87,9 @@ def main():
     st.header('Chat with PDF :robot_face:')
     st.subheader('Upload your PDF file and start chatting with it!')
     user_question = st.text_input('Enter your message here:')
-
+    pdf_file = st.file_uploader("Upload PDF", type=['pdf'])
     if st.button('Start Chain'):
         with st.spinner('Working in progress ...'):
-            pdf_file = st.file_uploader("Upload PDF", type=['pdf'])
             if pdf_file is not None:
                 pdf_text = get_pdf_text(pdf_file)
                 pdf_text_chunks = get_pdf_text_chunks(pdf_text)