解决：Warning: Permanently added ‘github.com’ (ED25519) to the list of known hosts.
git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.
原因：GitHub SSH秘钥不对
0. 检查本地是否有id_rsa、id_rsa.pub密匙
- 项目根目录下，输入命令
ls ~/.ssh（大概率没有以上两个文件，而只出现known hosts) 
1. 生成新秘钥
ssh-keygen -t ed25519 -C "xxx@xxx.com"（邮箱名称可随便填写）- 后面一直“回车”，使用默认设置就行
2. 检查生成的秘钥
ls ~/.ssh
3. 打开公钥
cat ~/.ssh/id_ed25519.pub
4. GitHub上配置SSH keys
- 个人设置settings --> SSH and GPG keys -->new SSH keys
- 复制粘贴刚刚获得的公钥
- 添加
