The `Values` are outdated

[mi-wada]

Problem

Current README.md content is outdated, because MF's MVVC is updated.

latest values are here.
https://corp.moneyforward.com/en/aboutus/mission/

ToDo

Either of these should be done.

1. modify the contents of README.md
2. just put a link to MVVC in README.md

2 is easier to maintain.