用语调整，key不再说明是OpenAI的了

ChuanhuChatbot.py

@@ -78,7 +78,7 @@ with gr.Blocks(css=customCSS, theme=small_and_beautiful_theme) as demo:
                 with gr.Tab(label=i18n("模型")):
                     keyTxt = gr.Textbox(
                         show_label=True,
-                        placeholder=f"OpenAI API-key...",
+                        placeholder=f"Your API-key...",
                         value=hide_middle_chars(user_api_key.value),
                         type="password",
                         visible=not HIDE_MY_KEY,