chore(deps): update dependency @docusaurus/preset-classic to v3.4.0

Author: renovate[bot]

package.json

@@ -17,7 +17,7 @@
   },
   "dependencies": {
     "@docusaurus/core": "3.0.0",
-    "@docusaurus/preset-classic": "3.0.0",
+    "@docusaurus/preset-classic": "3.4.0",
     "@mdx-js/react": "^3.0.0",
     "@vegaprotocol/docusaurus-theme-github-codeblock": "^0.1.8",
     "prism-react-renderer": "^2.1.0",