Change log for STEALTHBITS_DEFEND

Date Changes
2022-11-17 Enhancement:
- Added a new Grok pattern for newly supported CEF logs.
- Mapped the following fields:
- suser mapped to principal.user.userid.
- duser mapped to target.user.userid.
- shost mapped to principal.hostname.
- sntdom mapped to principal.domain.name.
- Attribute_Name mapped to security_result.summary.
- Operation mapped to security_result.description.
- Policy_Name mapped to security_result.rule_name.
- Attribute_Name mapped to security_result.summary.
- success mapped to security_result_action.