follows minor differences in content as highlighted by task BXMSDOC-6539.

Discussed with docs will be aligned with adoc comment 1st line in document as:

// If changing name, location, and structure of this document, align with Docs team; the golden master of this file is the one available at https://github.com/kiegroup/drools/blob/master/kie-dmn/ref-dmn-feel-builtin-functions.adoc