Change log for CISCO_PIX_FIREWALL

Date Changes
2025-12-23 Enhancement:
- A new grok pattern has been introduced to accommodate an additional log format.
- The conditional logic for setting event.idm.read_only_udm.network.direction to INBOUND has been updated to check for both "inbound" and "Inbound" values in the direction field.
2023-05-23 - Newly created parser.