Update Sparkplug WG name

As per eclipsefdn/it/websites/eclipse.org#501 (comment 2038663), the Eclipse Sparkplug WG should be renamed to Sparkplug.

added Working Groups statewip team:webdev webdev:java labels

assigned to @zacharysabourin

mentioned in commit zacharysabourin/eclipsefdn-working-groups-api@1433bcb1

mentioned in merge request !65 (merged)

mentioned in issue eclipsefdn/it/websites/eclipse.org#501 (closed)

added statereview label and removed statewip label

This is now live! https://api.eclipse.org/working-groups/sparkplug

closed