Fix: remove */6 from doc comment — PHP parses */ as end-of-comment

Changed cron example from '0 */6 * * *' to '0 0,6,12,18 * * *' to avoid
the */ closing the docblock prematurely and causing a syntax error.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

services/modpack-version-checker/blueprint-extension/app/Console/Commands/CheckModpackUpdates.php

@@ -13,7 +13,7 @@
  * 
  * RECOMMENDED CRON SCHEDULE:
  *     # Check for updates every 6 hours (adjust based on your server count)
- *     0 */6 * * * cd /var/www/pterodactyl && php artisan modpackchecker:check >> /dev/null 2>&1
+ *     0 0,6,12,18 * * * cd /var/www/pterodactyl && php artisan modpackchecker:check >> /dev/null 2>&1
  * 
  * HOW IT WORKS:
  * 1. Finds all servers with MODPACK_PLATFORM egg variable set