chore: improve niuzi bank command

src/main/kotlin/cn/rtast/fancybot/FancyBot.kt

@@ -33,7 +33,7 @@ class FancyBot : OneBotListener {
     private val coroutineScope = CoroutineScope(Dispatchers.IO)
 
     override suspend fun onWebsocketOpenEvent() {
-        this.broadcastMessage("FancyBot启动成功了呢~")
+        this.sendPrivateMessage(configManager.startUpNoticeUser, "FancyBot启动完成~")
     }
 
     override suspend fun onGroupMessage(message: GroupMessage, json: String) {