fix(cli): update link to documentation in preview home page

[co-sic]

Component / Package Name:

This PR contains:

• [x] bugfix
• [ ] feature
• [ ] refactor
• [x] documentation
• [ ] other

Are tests included?

• [ ] yes (bugfixes and features will not be merged without tests)
• [x] no

Breaking Changes?

• [ ] yes (breaking changes will not be merged unless absolutely necessary)
• [x] no

If yes, please include "BREAKING CHANGES:" in the first commit message body, followed by a description of what is breaking.

List any relevant issue numbers:

Description

Link on the preview homepage to the documentation currently still points to react-email package instead of this one. If this is intended feel free to close this PR.