Ironwind Frontiers - Creating Space Moon Plains Spawn Fix v1

Target mod: Creating Space 1.7.20 for Minecraft 1.21.1

Fix:
- Overrides data/creatingspace/worldgen/biome/moon_plains.json
- Changes the skeleton spawn entry from minCount: 0 to minCount: 1
- Leaves weight: 1 and maxCount: 2 unchanged

Installation:
1. Enable creatingspace-1.21.1-1.7.20.jar again.
2. Put this ZIP, without extracting it, in:
   config/paxi/datapacks
3. Start the game and create a fresh test world.

Expected result:
The log line "Spawn data: Value must be positive: 0" should no longer appear.
