Bump ejs from 2.6.2 to 3.1.7 in /docs/example/basic-app-website

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]

docs/example/basic-app-website/package-lock.json

@@ -12,6 +12,6 @@
     "@monax/burrow": "^0.24.3",
     "body-parser": "^1.18.3",
     "express": "^4.16.3",
-    "ejs": "^2.6.2"
+    "ejs": "^3.1.7"
   }
 }