Update app.py

app.py

@@ -66,9 +66,10 @@ css="""
 
 title = """
 <div style="text-align: center;max-width: 700px;">
-    <h1>Chat with PDF</h1>
+    <h1>Chat with PDF • OpenAI</h1>
     <p style="text-align: center;">Upload a .PDF from your computer, click the "Load PDF to LangChain" button, <br />
-    when everything is ready, you can start asking questions about the pdf ;)</p>
+    when everything is ready, you can start asking questions about the pdf ;) <br />
+    This version is set to store chat history, and uses OpenAI as LLM, don't forget to copy/paste your OpenAI API key</p>
 </div>
 """