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:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -45,7 +45,7 @@
     "assemble-contrib-permalinks": "*",
     "autoprefixer": "^6.7.7",
     "cssnano": "^4.1.11",
-    "ejs": "^2.7.4",
+    "ejs": "^3.1.7",
     "eslint": "^4.19.1",
     "eslint-config-prettier": "^2.10.0",
     "eslint-plugin-prettier": "^2.7.0",