build(deps): bump ejs and strong-error-handler in /examples/simple

Bumps [ejs](https://github.com/mde/ejs) to 3.1.8 and updates ancestor dependency [strong-error-handler](https://github.com/strongloop/strong-error-handler). These dependencies need to be updated together.


Updates `ejs` from 2.6.1 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@v2.6.1...v3.1.8)

Updates `strong-error-handler` from 3.2.0 to 3.5.0
- [Release notes](https://github.com/strongloop/strong-error-handler/releases)
- [Changelog](https://github.com/loopbackio/strong-error-handler/blob/master/CHANGES.md)
- [Commits](loopbackio/strong-error-handler@v3.2.0...v3.5.0)

---
updated-dependencies:
- dependency-name: ejs
  dependency-type: indirect
- dependency-name: strong-error-handler
  dependency-type: direct:production
...

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