HPCC-9444 Details of where to find the files for the Programmers Guide are incorrect

Signed-off-by: RichardTaylorHPCC <richard.taylor@lexisnexis.com>
Merge pull request #4472 from RichardTaylorHPCC/B9444

HPCC-9444 Details of where to find the files for the Programmers Guide a...

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>