chore(deps): bump ejs and @rocket/cli

Removes [ejs](https://github.com/mde/ejs). It's no longer used after updating ancestor dependency [@rocket/cli](https://github.com/modernweb-dev/rocket/tree/HEAD/packages/cli). These dependencies need to be updated together.


Removes `ejs`

Updates `@rocket/cli` from 0.10.2 to 0.21.0
- [Release notes](https://github.com/modernweb-dev/rocket/releases)
- [Changelog](https://github.com/modernweb-dev/rocket/blob/main/packages/cli/CHANGELOG.md)
- [Commits](https://github.com/modernweb-dev/rocket/commits/@rocket/[email protected]/packages/cli)

---
updated-dependencies:
- dependency-name: ejs
  dependency-type: indirect
- dependency-name: "@rocket/cli"
  dependency-type: direct:production
...

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