Bump ejs and workbox-cli

Bumps [ejs](https://github.com/mde/ejs) to 3.1.8 and updates ancestor dependency [workbox-cli](https://github.com/googlechrome/workbox). These dependencies need to be updated together.


Updates `ejs` from 2.7.4 to 3.1.8
- [Release notes](https://github.com/mde/ejs/releases)
- [Changelog](https://github.com/mde/ejs/blob/main/CHANGELOG.md)
- [Commits](mde/ejs@v2.7.4...v3.1.8)

Updates `workbox-cli` from 5.1.3 to 6.5.4
- [Release notes](https://github.com/googlechrome/workbox/releases)
- [Commits](GoogleChrome/workbox@v5.1.3...v6.5.4)

---
updated-dependencies:
- dependency-name: ejs
  dependency-type: indirect
- dependency-name: workbox-cli
  dependency-type: direct:development
...

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