HPCC-9207 DOCS: DECIMAL not supported in DISTRIBUTION action

Signed-off-by: Jim DeFabia <jamesdefabia@lexisnexis.com>
Merge pull request #6496 from JamesDeFabia/9207_fixDocsForDISTRIBUTION

HPCC-9207 DOCS: DECIMAL not supported in DISTRIBUTION action

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>