HPCC-10311 Update example to match new field name semantics

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #5739 from ghalliday/issue10311b

HPCC-10311 Update example to match new field name semantics

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>