HPCC-11796 DOCS:Update ECL Playground images

Fix HPCC-11796 DOCS:Update ECL Playground images
Update images for the ECL Playground in ECL Watch 5.0

Signed-off-by: g-pan <greg.panagiotatos@lexisnexis.com>
Merge pull request #6166 from g-pan/H11796-Plygd

HPCC-11796 DOCS:Update ECL Playground images

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>