Merge pull request #6065 from cli/eljog/update-ssh-help

SSH help text to suggest the new features syntax

pkg/cmd/codespace/ssh.go

@@ -66,11 +66,13 @@ func newSSHCmd(app *App) *cobra.Command {
 
 			Note that the codespace you are connecting to must have an SSH server pre-installed.
 			If the docker image being used for the codespace does not have an SSH server,
-			install it in your Dockerfile or you can try adding the following snippet
-			in your devcontainer.json:
-			
+			install it in your Dockerfile or, for codespaces that use Debian-based images,
+			you can add the following to your devcontainer.json:
+
 			"features": {
-				"sshd": "latest"
+				"ghcr.io/devcontainers/features/sshd:1": {
+					"version": "latest"
+				}
 			}
 		`),
 		Example: heredoc.Doc(`