Add callout markdown

Author: lecoursen

content/authentication/connecting-to-github-with-ssh/testing-your-ssh-connection.md

@@ -56,6 +56,10 @@ When you test your connection, you'll need to authenticate this action using you
 
   {% endlinux %}
 
-  **Note:** the remote command will exit with code 1.
+   {% note %}
+
+   **Note:** The remote command should exit with code 1.
+
+   {% endnote %}
 
 4. Verify that the resulting message contains your username. If you receive a "permission denied" message, see ["Error: Permission denied (publickey)"](/articles/error-permission-denied-publickey).