changed "OpenAI key" -> "LLM-authorization key"

app.py

@@ -137,7 +137,7 @@ try:
         st.sidebar.header('Options:')
 
         # OpenAI Key Input
-        openai_key = st.sidebar.text_input("Enter OpenAI Key:", type="password")
+        openai_key = st.sidebar.text_input("Enter LLM-authorization Key:", type="password")
 
         if openai_key:
             task_options = ['Extractive', 'Generative']