[v35.6] Minor Readme Issues

[Delior]

Hi David, just a couple of minor notes for the SCS readme:

- There is no description for the component "Make Elemental Arrows like BG2."

- In the additional details (spoilers) section, your description for the BG1 Improved Final Battle component is missing a subheader, which makes it look like it is part of the description of the chapter 5 component.  

[DavidW]

Thanks, will fix.