Update build24.sh

Author: wkccd

rockchip/build24.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 # Log file for debugging
+sed -i 's#https://downloads.immortalwrt.org#https://mirror.nju.edu.cn/immortalwrt#g' repositories.conf
 source shell/custom-packages.sh
 echo "第三方软件包: $CUSTOM_PACKAGES"
 LOGFILE="/tmp/uci-defaults-log.txt"
@@ -103,4 +104,4 @@ if [ $? -ne 0 ]; then
     exit 1
 fi
 
-echo "$(date '+%Y-%m-%d %H:%M:%S') - Build completed successfully."
+echo "$(date '+%Y-%m-%d %H:%M:%S') - Build completed successfully."