Update using-ssh-over-the-https-port.md

The user for connecting must be "git"

Author: bon77

content/github/authenticating-to-github/using-ssh-over-the-https-port.md

@@ -33,6 +33,7 @@ To set this in your ssh config, edit the file at `~/.ssh/config`, and add this s
 Host {% data variables.command_line.codeblock %}
   Hostname ssh.{% data variables.command_line.codeblock %}
   Port 443
+  User git
 ```
 
 You can test that this works by connecting once more to {% data variables.product.product_location %}: