Change log for CISCO_IOS

Date Changes
2024-11-25 Enhancement:
- Added a Grok pattern to parse new logs.
- Mapped hostname in syslog header to "intermediary.hostname" from "target.hostname".
2024-11-19 Enhancement:
- Added support for a new format of syslog logs.
2024-10-28 Enhancement:
- Added a Grok pattern to parse new logs.
2024-10-24 Enhancement:
- Added a Grok pattern to parse new logs.
2024-10-01 Enhancement:
- Added a Grok pattern to parse new logs.
2024-07-04 Enhancement:
- Added support for a new pattern of syslog logs.
2024-04-02 Enhancement:
- Added a new Grok pattern to parse new log type.
- Mapped the new fields to corresponding UDM fields.
2023-10-04 Enhancement:
- Added a new Grok pattern to parse new log type.
- Mapped "source_facility" to "principal.hostname".
2023-08-11 Enhancement:
- Mapped "intermediary.ip" when message contains "HOST=".
- Mapped "principal.user.userid" when message contains "User:".
- Mapped "principal.process.command_line" when message contains "command:".
- Mapped "target.user.userid" when message contains "username".
- Mapped "metadata.event_type" to a more specific "metadata.event_type".