Mercenaries now have upgraded first aid kits
- Human Mercenary: 2 standard first aid kits
- Heavy Mercenary: 2 standard first aid kits
- Mercenary: 2 standard first aid kits
- Mercenary Captain: 1 advanced first aid kit

Since it didn't make sense that we could hire them for longer but have them unprepared.

For unimported saves, this change in inventory will only apply to mercenaries you have not yet met in-game. Similarly, you can import to view the inventory change immediately.

Thanks to Headhunter and abquintess.

Other
Minor sentence corrections.