chore(deps): bump ejs and hexo-renderer-ejs

Bumps [ejs](https://github.com/mde/ejs) to 3.1.8 and updates ancestor dependency [hexo-renderer-ejs](https://github.com/hexojs/hexo-renderer-ejs). These dependencies need to be updated together.


Updates `ejs` from 2.5.7 to 3.1.8
- [Release notes](https://github.com/mde/ejs/releases)
- [Changelog](https://github.com/mde/ejs/blob/main/CHANGELOG.md)
- [Commits](mde/ejs@v2.5.7...v3.1.8)

Updates `hexo-renderer-ejs` from 0.3.1 to 2.0.0
- [Release notes](https://github.com/hexojs/hexo-renderer-ejs/releases)
- [Commits](hexojs/hexo-renderer-ejs@0.3.1...2.0.0)

---
updated-dependencies:
- dependency-name: ejs
  dependency-type: indirect
- dependency-name: hexo-renderer-ejs
  dependency-type: direct:production
...

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

package.json

@@ -28,7 +28,7 @@
     "hexo-generator-feed": "^3.0.0",
     "hexo-generator-index": "^0.2.0",
     "hexo-generator-tag": "^0.2.0",
-    "hexo-renderer-ejs": "^0.3.0",
+    "hexo-renderer-ejs": "^2.0.0",
     "hexo-renderer-marked": "^3.0.0",
     "hexo-renderer-stylus": "^0.3.1",
     "hexo-server": "^0.2.0",