update app text

app.py

@@ -61,11 +61,10 @@ with gr.Blocks(
     This tool allows you to upload PDF files and search for the most relevant pages based on your query.
     Refresh the page if you change documents!
 
-    ⚠️ This demo uses a model trained exclusively on A4 PDFs in portrait mode, containing english text. Performance is expected to drop for other page formats and languages.
-    Other models will be released with better robustness towards different languages and document formats!
+    ⚠️ This demo uses a CPU version of the model, so it may be slow. For faster results you may want to fork the space and run it on a GPU.
     """)
 
-    api_key = gr.Textbox(placeholder="Enter your OpenAI KEY here (optional)", label="API key")
+    api_key = gr.Textbox(placeholder="Enter your OpenAI KEY here", label="API key")
 
     stored_messages = gr.State(value=[])