Bump @types/core-js from 2.5.5 to 2.5.6 in /frontend

Bumps [@types/core-js](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/core-js) from 2.5.5 to 2.5.6.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/core-js)

---
updated-dependencies:
- dependency-name: "@types/core-js"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

frontend/package.json

@@ -39,7 +39,7 @@
     "@testing-library/react": "^12.1.5",
     "@testing-library/user-event": "^14.5.1",
     "@types/classnames": "^2.3.1",
-    "@types/core-js": "^2.5.5",
+    "@types/core-js": "^2.5.6",
     "@types/jest": "^28.1.8",
     "@types/js-cookie": "^3.0.3",
     "@types/lodash-es": "^4.17.9",

frontend/yarn.lock

@@ -1853,10 +1853,10 @@
   dependencies:
     classnames "*"
 
-"@types/core-js@^2.5.5":
-  version "2.5.5"
-  resolved "https://registry.yarnpkg.com/@types/core-js/-/core-js-2.5.5.tgz#dc5a013ee0b23bd5ac126403854fadabb4f24f75"
-  integrity sha512-C4vwOHrhsvxn7UFyk4NDQNUpgNKdWsT/bL39UWyD75KSEOObZSKa9mYDOCM5FGeJG2qtbG0XiEbUKND2+j0WOg==
+"@types/core-js@^2.5.6":
+  version "2.5.6"
+  resolved "https://registry.yarnpkg.com/@types/core-js/-/core-js-2.5.6.tgz#b06885ab91decdc4045215dbc4edbf02f061900d"
+  integrity sha512-zLzoC7avO4EYUUYCSzDaahSP1QJEpZQcPxqs91mPeFdh2NS4hQBcnRoEc9RuXfJ8cdN/KXUWukMmZGcKaWeOvw==
 
 "@types/eslint@^7.2.6":
   version "7.2.7"