Fixed typos

I also made two tweaks that you may disagree with:
  For lines 236-237, shouldn't you use the singular noun as you show quantity at end? Sample: Human Effigy (Max 10)
  For line 735: Isn't Undead already plural? "Face the ambush by the Artificial Undead"

Also, I sent you feedback over reddit. I suggested adding the web URL for the checklist. At the top of the repository, you can set the URL if you click Edit near the title of the repository. Please view my fork to this in use.