Changing simplified-expenses-checker v2 files into v1

This is due to be published 12th August
Updating state-pension-through-partner v2 to v1
Merge pull request #1056 from alphagov/publish_simplified_expenses_checker

Updating simplified-expenses-checker smart-answer
Merge pull request #1057 from alphagov/publish_state_pension_through_partner

Updating state-pension-through-partner smart-answer
Fixed typo
Merge pull request #1058 from lutgendorff/patch-6

Fixed typo