Bump ejs from 2.6.2 to 3.1.7 in /servers/search-server

Bumps [ejs](https://github.com/mde/ejs) from 2.6.2 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@v2.6.2...v3.1.7)

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

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

Author: dependabot[bot]

servers/search-server/package-lock.json

@@ -15,7 +15,7 @@
     "connect-flash": "~0.1.1",
     "cookie-parser": "^1.4.5",
     "core-js": "^3.9.0",
-    "ejs": "~2.6.1",
+    "ejs": "~3.1.7",
     "express": "~4.16.4",
     "express-session": "~1.15.6",
     "method-override": "~3.0.0",