Rename Activity GGI-A-42 title to "Manage open source skills and resources"
As discussed in https://pad.castalia.camp/p/meetings-2022-07-18-suo0lvq
We'll stick to our 'structural decision' to let it go with the overlapping headers, while trying to shorten the activity titles.
The new name for this activity is also more consistent with the related activity "GGI-A-17 Inventory of open source skills and resources".