Make "About" Tab on Keep.id Website Redirect to Team Keep Website

**Describe the bug**
The "About" Tab on the Keep.id website should redirect to the Team Keep website (https://team.keep.id)
Also, the footer link https://keep.id/our-mission should redirect to the Team Keep website too

The current outdated mission/values/vision page should be removed, as all this information is on the Team Keep website