Bump moment from 2.29.1 to 2.29.4 (#312)

Bumps [moment](https://github.com/moment/moment) from 2.29.1 to 2.29.4.
- [Changelog](https://github.com/moment/moment/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/moment/moment/compare/2.29.1...2.29.4)

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

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package.json

@@ -30,7 +30,7 @@
     "express-hbs": "~2.4.0",
     "http-headers": "~3.0.2",
     "kleur": "~4.1.4",
-    "moment": "~2.29.1",
+    "moment": "~2.29.4",
     "morgan": "~1.10.0",
     "nanoid": "~3.3.2",
     "pa11y-webservice": "~4.0.1",