更换PVE源为非订阅源

官方默认使用的是订阅源，更新的时候会提示你403。

#备份
mv /etc/apt/sources.list.d/pve-enterprise.list /etc/apt/sources.list.d/pve-enterprise.list.bak
#新增
echo 'deb http://mirrors.ustc.edu.cn/proxmox/debian/pve bullseye pve-no-subscription' >> /etc/apt/sources.list.d/pve-no-subscription.list

#更新
apt update
apt upgrade

参考资料：

https://www.cnblogs.com/varden/p/15193644.html

https://blog.csdn.net/MiddleWeek/article/details/120272402