Bump ejs from 2.7.1 to 2.7.4 (#13973)

Bumps [ejs](https://github.com/mde/ejs) from 2.7.1 to 2.7.4.
- [Release notes](https://github.com/mde/ejs/releases)
- [Changelog](https://github.com/mde/ejs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mde/ejs/compare/v2.7.1...v2.7.4

)

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