fix wrong paper PDF link

demo.py

@@ -95,7 +95,7 @@ def gradio_answer(chatbot, chat_state, img_list, num_beams, temperature):
 
 title = """<h1 align="center">Demo of MiniGPT-4</h1>"""
 description = """<h3>This is the demo of MiniGPT-4. Upload your images and start chatting!</h3>"""
-article = """<p><a href='https://minigpt-4.github.io'><img src='https://img.shields.io/badge/Project-Page-Green'></a></p><p><a href='https://github.com/Vision-CAIR/MiniGPT-4'><img src='https://img.shields.io/badge/Github-Code-blue'></a></p><p><a href='https://github.com/TsuTikgiau/blip2-llm/blob/release_prepare/MiniGPT_4.pdf'><img src='https://img.shields.io/badge/Paper-PDF-red'></a></p>
+article = """<p><a href='https://minigpt-4.github.io'><img src='https://img.shields.io/badge/Project-Page-Green'></a></p><p><a href='https://github.com/Vision-CAIR/MiniGPT-4'><img src='https://img.shields.io/badge/Github-Code-blue'></a></p><p><a href='https://raw.githubusercontent.com/Vision-CAIR/MiniGPT-4/main/MiniGPT_4.pdf'><img src='https://img.shields.io/badge/Paper-PDF-red'></a></p>
 """
 
 #TODO show examples below
@@ -142,4 +142,4 @@ def gradio_answer(chatbot, chat_state, img_list, num_beams, temperature):
     )
     clear.click(gradio_reset, [chat_state, img_list], [chatbot, image, text_input, upload_button, chat_state, img_list], queue=False)
 
-demo.launch(share=True, enable_queue=True)
+demo.launch(share=True, enable_queue=True)