minor; log on skipping cronitor due to KeyError

Signed-off-by: Chirag Aggarwal <thechiragaggarwal@gmail.com>

borgmatic/hooks/cronitor.py

@@ -35,8 +35,9 @@ def ping_monitor(hook_config, config_filename, state, monitoring_log_level, dry_
 
     dry_run_label = ' (dry run; not actually pinging)' if dry_run else ''
     try:
-        ping_url = f"{hook_config[action_name]}/{MONITOR_STATE_TO_CRONITOR[state]}"
+        ping_url = f"{hook_config['sss']}/{MONITOR_STATE_TO_CRONITOR[state]}"
     except KeyError:
+        logger.debug(f'{config_filename}: Skipping Cronitor {state.name.lower()} ping due to unconfigured action: {action_name}')
         return
 
     logger.info(f'{config_filename}: Pinging Cronitor {state.name.lower()}{dry_run_label}')