fix: upgrade nextra-theme-docs from 2.13.3 to 2.13.4

Snyk has created this PR to upgrade nextra-theme-docs from 2.13.3 to 2.13.4.

See this package in npm:
https://www.npmjs.com/package/nextra-theme-docs

See this project in Snyk:
https://app.snyk.io/org/ivan-QBnRiSBZoUxnTVY6mQXyuA/project/a3c60ec2-739f-4e92-ad5f-338635aebcd0?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -10,7 +10,7 @@
     "clsx": "2.1.0",
     "next-sitemap": "4.2.3",
     "nextra": "2.13.3",
-    "nextra-theme-docs": "2.13.3",
+    "nextra-theme-docs": "2.13.4",
     "postcss": "8.4.35",
     "react": "18.2.0",
     "react-dom": "18.2.0",