fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - react from 18.2.0 to 18.3.1.
    See this package in npm: https://www.npmjs.com/package/react
  - react-dom from 18.2.0 to 18.3.1.
    See this package in npm: https://www.npmjs.com/package/react-dom

See this project in Snyk:
https://app.snyk.io/org/zntb/project/be576617-3b31-4979-bdde-f06ac2d04b83?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

frontend/package-lock.json

@@ -6,8 +6,8 @@
     "@testing-library/jest-dom": "^5.16.5",
     "@testing-library/react": "^13.4.0",
     "@testing-library/user-event": "^13.5.0",
-    "react": "^18.2.0",
-    "react-dom": "^18.2.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
     "react-router-dom": "^6.4.1",
     "react-scripts": "5.0.1",
     "web-vitals": "^2.1.4"