Update Github ssh fingerprints

[richardtippl-ext90046]

A few months ago, Github leaked their RSA private key and changed public facing fingerprints. This action, when operating in remote mode validates fingerprints for Github, but contains fingerprints from before the change.

Please update the fingerprints to use the current keys.

See:
https://github.blog/2023-03-23-we-updated-our-rsa-ssh-host-key/
https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/githubs-ssh-key-fingerprints