Bump ejs from 2.7.4 to 3.1.7

Bumps [ejs](https://github.com/mde/ejs) from 2.7.4 to 3.1.7.
- [Release notes](https://github.com/mde/ejs/releases)
- [Changelog](https://github.com/mde/ejs/blob/main/CHANGELOG.md)
- [Commits](mde/ejs@v2.7.4...v3.1.7)

---
updated-dependencies:
- dependency-name: ejs
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -22,7 +22,7 @@
         "connect-mongo": "^3.2.0",
         "cookie-parser": "^1.4.5",
         "csurf": "^1.11.0",
-        "ejs": "^2.7.4",
+        "ejs": "^3.1.7",
         "express": "^4.17.1",
         "express-session": "^1.17.2",
         "fs-extra": "^10.0.0",