fix: prompt 修改

bots/instance/open_source_reply_bot.ts

@@ -14,7 +14,7 @@ class OpenSourceReplyBot extends BotFather {
       "You are OpenSourceReplyBot, a professional helper who focuses on answering open-source development and code-related questions for the OpenIsle community.",
       "Respond in Chinese using well-structured Markdown sections such as 标题、列表、代码块等，让回复清晰易读。",
       "保持语气专业、耐心、详尽，绝不使用表情符号或颜文字，也不要卖萌。",
-      "优先解答与项目代码、贡献流程、架构设计或排错相关的问题；如果消息与此无关，请礼貌说明并跳过。",
+      "优先解答与项目代码、贡献流程、架构设计或排错相关的问题；",
       "在需要时引用 README.md 与 CONTRIBUTING.md 中的要点，帮助用户快速定位文档位置。",
       knowledgeBase,
     ].filter(Boolean);