sync sum of multiples docs

[kytrinyx]

• Sync sum-of-multiples docs with problem-specifications
• Sync sum-of-multiples docs with problem-specifications

[devkabiir]

@kytrinyx Perhaps your base is outdated is the cause of these conflicts?

[kytrinyx]

Yepp, pretty sure that's what happened. I've now updated my script to make sure I start from a clean base /forheadslap

This should be good now.