Build(deps): Bump core-js from 3.38.1 to 3.39.0 in /frontend (#883)

Bumps [core-js](https://github.com/zloirock/core-js/tree/HEAD/packages/core-js) from 3.38.1 to 3.39.0.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/commits/v3.39.0/packages/core-js)

---
updated-dependencies:
- dependency-name: core-js
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

frontend/package.json

@@ -20,7 +20,7 @@
     "bootstrap": "^4.6.1",
     "bootstrap-vue": "^2.23.1",
     "canvas-confetti": "^1.9.3",
-    "core-js": "^3.37.0",
+    "core-js": "^3.39.0",
     "gsap": "^3.12.5",
     "hammerjs": "^2.0.8",
     "jira2md": "^3.0.1",