chore(root-deps)(deps): bump nextra-theme-docs from 2.13.4 to 4.0.0

Bumps [nextra-theme-docs](https://github.com/shuding/nextra) from 2.13.4 to 4.0.0.
- [Release notes](https://github.com/shuding/nextra/releases)
- [Commits](https://github.com/shuding/nextra/compare/nextra-theme-docs@2.13.4...nextra-theme-docs@4.0.0)

---
updated-dependencies:
- dependency-name: nextra-theme-docs
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

apps/docs/package.json

@@ -15,7 +15,7 @@
         "next": "^14.0.0",
         "next-sitemap": "^4.2.3",
         "nextra": "^2.13.3",
-        "nextra-theme-docs": "^2.13.3",
+        "nextra-theme-docs": "^4.0.0",
         "react": "^18.0.2",
         "react-dom": "^18.0.2"
     },