fix macbook ssh to github timeout issue

fix-mac-git-timeout-issue.md

% ssh -T git@github.com

ssh: connect to host github.com port 22: Operation timed out

% vi ~/.ssh/config

add the following to the config file

# allows git ssh
Host github.com
Hostname ssh.github.com
Port 443

then try the following

% ssh -T -p 443 git@ssh.github.com

Hi 1solation! You've successfully authenticated, but GitHub does not provide shell access.

initially created for M1 macbook, problem occurs on intel MacBook also. updating title & description to remove M1 as it isn't M1 specific.

follow the usual guide on GitHub docs to initially generate a new SSH key and then add said new key to GitHub first. Then apply this fix if you're getting the ssh: connect to host github.com port 22: Operation timed out error