authenticity

The authenticity of host 'github.com (20.205.243.166)' can't be established.
ED25519 key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])?

少了一个 known_hosts 文件，本来密钥文件应该是三个，现在是两个，就会报这样的错误，此时选择 yes 回车之后，即可，同时生成缺少的 known_hosts 文件