Bump ms and docpad

Bumps [ms](https://github.com/vercel/ms) to 2.1.2 and updates ancestor dependency [docpad](https://github.com/docpad/docpad). These dependencies need to be updated together.


Updates `ms` from 0.7.1 to 2.1.2
- [Release notes](https://github.com/vercel/ms/releases)
- [Commits](vercel/ms@0.7.1...2.1.2)

Updates `docpad` from 6.79.4 to 6.83.2
- [Changelog](https://github.com/docpad/docpad/blob/master/HISTORY.md)
- [Commits](docpad/docpad@v6.79.4...v6.83.2)

---
updated-dependencies:
- dependency-name: ms
  dependency-type: indirect
- dependency-name: docpad
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>