HPCC-11752 FIx IMPORT example in docs

Signed-off-by: JamesDeFabia <James.Defabia@LexisNexis.com>
HPCC-11752 Edits based upon code review

Signed-off-by: JamesDeFabia <James.Defabia@LexisNexis.com>
Merge pull request #6100 from JamesDeFabia/11752_Fix_IMPORT_DocsExample

HPCC-11752 FIx IMPORT example in docs

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>