Add group label to release post template
Now that all group::
labels are moved to this project (thanks to #5668 (closed)), we should now mandate their use in release post blocks.
With a growing TW team, the group assignments will be fluctuating over the next few months, and proper labeling will make sure the correct TW for each group reviews their RP blocks.
Closes #5668 (closed)
Edited by Marcel Amirault