Bump ejs from 3.1.8 to 3.1.10 in /frontend

Bumps [ejs](https://github.com/mde/ejs) from 3.1.8 to 3.1.10.
- [Release notes](https://github.com/mde/ejs/releases)
- [Commits](mde/ejs@v3.1.8...v3.1.10)

---
updated-dependencies:
- dependency-name: ejs
  dependency-type: indirect
...

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