Developers on GitHub, man in the middle is a serious threat, but servers are being updated regularly too. So if you received warning message telling you that remote host identification has changed when you trying to connect to GitHub, please don't just blindly follow tutorials that guiding you to delete offending host from known_hosts file, verify authenticity of that fingerprint here https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/githubs-ssh-key-fingerprints