Bump moment from 2.27.0 to 2.29.4 in /frontend

Bumps [moment](https://github.com/moment/moment) from 2.27.0 to 2.29.4.
- [Release notes](https://github.com/moment/moment/releases)
- [Changelog](https://github.com/moment/moment/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/moment/moment/compare/2.27.0...2.29.4)

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

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

frontend/package.json

@@ -26,7 +26,7 @@
     "messageformat": "^2.3.0",
     "messageformat-loader": "^0.8.1",
     "mini-css-extract-plugin": "^0.9.0",
-    "moment": "^2.24.0",
+    "moment": "^2.29.4",
     "node-sass": "^6.0.1",
     "nodemon": "^2.0.2",
     "numeral": "^2.0.6",

frontend/yarn.lock

@@ -4433,10 +4433,10 @@ mkdirp@^1.0.3:
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-1.0.4.tgz#3eb5ed62622756d79a5f0e2a221dfebad75c2f7e"
   integrity sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==
 
-moment@^2.24.0:
-  version "2.27.0"
-  resolved "https://registry.yarnpkg.com/moment/-/moment-2.27.0.tgz#8bff4e3e26a236220dfe3e36de756b6ebaa0105d"
-  integrity sha512-al0MUK7cpIcglMv3YF13qSgdAIqxHTO7brRtaz3DlSULbqfazqkc5kEjNrLDOM7fsjshoFIihnU8snrP7zUvhQ==
+moment@^2.29.4:
+  version "2.29.4"
+  resolved "https://registry.yarnpkg.com/moment/-/moment-2.29.4.tgz#3dbe052889fe7c1b2ed966fcb3a77328964ef108"
+  integrity sha512-5LC9SOxjSc2HF6vO2CyuTDNivEdoz2IvyJJGj6X8DJ0eFyfszE0QiEd+iXmBvUP3WHxSjFH/vIsA0EN00cgr8w==
 
 move-concurrently@^1.0.1:
   version "1.0.1"