HPCC-9540 Standard Library Ref - CountWordsused instead of WordCount

Signed-off-by: RichardTaylorHPCC <richard.taylor@lexisnexis.com>
Merge pull request #4641 from RichardTaylorHPCC/B9540

HPCC-9540 Standard Library Ref - CountWords used instead of WordCount

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>