Add host key verification failed to Troubleshooting SSH

[jsoref]

Code of Conduct

• I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/authentication/troubleshooting-ssh

What part(s) of the article would you like to see updated?

Create a new page for host key verification failed

• It should explain how to determine the current public keys for github, possibly by linking to: https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/githubs-ssh-key-fingerprints, although iirc there's also a server api which ideally should be reachable from that page but is not.

• It could provide a bit of information about the general state

• It should explain how to check, confirm, and accept the keys if they're correct.

Additional information

• https://gh.neting.ccmunity/search?q=host%20key%20verification%20failed
• https://gh.neting.ccmunity/t/git-host-key-verification-failed/227295/1

[cmwilson21]

@jsoref Thanks so much for opening an issue! I'll triage this for the team to take a look 👀

[lecoursen]

Thanks @jsoref, I agree that would be a useful article to add. You or anyone else is welcome to open a PR doing so!

[jsoref]

Err, I didn't realize that there was a bot that killed todos.

[cmwilson21]

👋 @jsoref - Looks like there was a hiccup with the bot. Sorry about that!

Reopened for help wanted work! ✨

[jsoref]

@cmwilson21... I am I in the process of writing up a list of things that the bot gets wrong...

[cmwilson21]

@jsoref We are investigating the recent hiccups with stalebot. Sorry for the noise it's creating. We're looking into it! 👍