Bump postcss and @react-email/components in /test/frameworks/remix-epic

Bumps [postcss](https://github.com/postcss/postcss) to 8.4.38 and updates ancestor dependency [@react-email/components](https://github.com/resend/react-email/tree/HEAD/packages/components). These dependencies need to be updated together.


Updates `postcss` from 8.4.28 to 8.4.38
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.28...8.4.38)

Updates `@react-email/components` from 0.0.7 to 0.0.16
- [Release notes](https://github.com/resend/react-email/releases)
- [Commits](https://github.com/resend/react-email/commits/@react-email/[email protected]/packages/components)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: indirect
- dependency-name: "@react-email/components"
  dependency-type: direct:production
...

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