HPCC-9606 Update doc images in Tech Prev

Signed-off-by: g-pan <greg.panagiotatos@lexisnexis.com>
Merge pull request #4584 from g-pan/H9606-TchPrvImg

HPCC-9606 Update doc images in Tech Prev

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>