update java link

Author: MagicTeaMC

README.md

@@ -11,7 +11,7 @@
 如果您熟悉 bat 語法，歡迎使用 PR 做出貢獻！
 ## 使用方法
 1.前往 [Releases](https://github.com/MagicTeaMC/Minecraft-server-auto-setup/releases/) 下載 `Minecraft-server-auto-setup.exe`  
-2.安裝 [Java 17](https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.7%2B7/OpenJDK17U-jdk_x64_windows_hotspot_17.0.7_7.msi)  
+2.安裝 [Java 17](https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.9%2B9.1/OpenJDK17U-jdk_x64_windows_hotspot_17.0.9_9.msi) 或 [Java 21(推薦)](https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.1%2B12/OpenJDK21U-jdk_x64_windows_hotspot_21.0.1_12.msi)  
 3.將 `Minecraft-server-auto-setup.exe` 放在一個全新的資料夾中執行，並且依照顯示的步驟進行即可  
 **如果使用 NGROK，請按照[這個步驟](./NGROK.md)查看如何獲取 IP 位址。(未來會讓這過程變得簡便一些，應該吧)**
 ## 功能