chore(deps-dev): bump the docs group in /docs with 2 updates

Bumps the docs group in /docs with 2 updates: [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) and [vitepress](https://github.com/vuejs/vitepress).


Updates `@types/node` from 20.6.0 to 20.8.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

Updates `vitepress` from 1.0.0-rc.12 to 1.0.0-rc.20
- [Release notes](https://github.com/vuejs/vitepress/releases)
- [Changelog](https://github.com/vuejs/vitepress/blob/main/CHANGELOG.md)
- [Commits](vuejs/vitepress@v1.0.0-rc.12...v1.0.0-rc.20)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: docs
- dependency-name: vitepress
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: docs
...

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

docs/package.json

@@ -7,8 +7,8 @@
     "preview": "vitepress preview"
   },
   "devDependencies": {
-    "@types/node": "^20.6.0",
+    "@types/node": "^20.8.0",
     "prettier": "^3.0.3",
-    "vitepress": "^1.0.0-rc.12"
+    "vitepress": "^1.0.0-rc.20"
   }
 }