adds the MAPBOXTILESET env var to the action.yml. This is necessary to ensure that the harvester.py can use that env var. Previously this was not the case, that's why our MAPBOXTILESET was always None
adds an understandable name to the tileset -> easier in Mapbox UI to distinguish the tilesets
This PR
harvester.py
can use that env var. Previously this was not the case, that's why our MAPBOXTILESET was alwaysNone