fix(deps): bump nuxt from 2.18.1 to 4.3.0 in /scorecards-site

Bumps [nuxt](https://github.com/nuxt/nuxt/tree/HEAD/packages/nuxt) from 2.18.1 to 4.3.0.
- [Release notes](https://github.com/nuxt/nuxt/releases)
- [Commits](https://github.com/nuxt/nuxt/commits/v4.3.0/packages/nuxt)

---
updated-dependencies:
- dependency-name: nuxt
  dependency-version: 4.3.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

scorecards-site/package.json

@@ -29,7 +29,7 @@
     "@tailwindcss/typography": "^0.4.1",
     "clipboard": "^2.0.10",
     "highlight.js": "^11.11.1",
-    "nuxt": "^2.15.8",
+    "nuxt": "^4.3.1",
     "prismjs": "^1.30.0",
     "rehype-add-classes": "^1.0.0",
     "sass-loader": "10",