style: restore PEP8 blank-line separation after dead-code removal

The deletions in the salvaged commit left some top-level defs/classes
separated by a single blank line. Restore the 2-blank-line separation.

hermes_cli/main.py

@@ -6158,6 +6158,8 @@ def cmd_webhook(args):
     from hermes_cli.webhook import webhook_command
 
     webhook_command(args)
+
+
 def cmd_slack(args):
     """Slack integration helpers.