Bump nunjucks from 3.0.1 to 3.2.4 in /parlai/chat_service/core/server (…

…#5077)

Bumps [nunjucks](https://github.com/mozilla/nunjucks) from 3.0.1 to 3.2.4.
- [Release notes](https://github.com/mozilla/nunjucks/releases)
- [Changelog](https://github.com/mozilla/nunjucks/blob/master/CHANGELOG.md)
- [Commits](mozilla/nunjucks@v3.0.1...v3.2.4)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

parlai/chat_service/core/server/package.json

@@ -17,7 +17,7 @@
     "async-lock": "1.0.0",
     "body-parser": "1.17.2",
     "express": "4.15.3",
-    "nunjucks": "3.0.1",
+    "nunjucks": "3.2.4",
     "wait-until": "0.0.2",
     "ws": "5.2.3"
   }