Harmonize list of "audit types" (SEARCH and DISABLED)

[dayures]

In the documentation (https://docs.dhis2.org/en/manage/performing-system-administration/dhis-core-version-master/audit.html#audit_type) the list of audit types are different. In one place it appears "SEARCH" (but there is no explanation about it). In another part of the documentaion appears "DISABLED" (but only in one place)