build(deps-dev): bump vitepress from 0.12.2 to 0.13.0 in /docs

Bumps [vitepress](https://github.com/vuejs/vitepress) from 0.12.2 to 0.13.0.
- [Release notes](https://github.com/vuejs/vitepress/releases)
- [Changelog](https://github.com/vuejs/vitepress/blob/master/CHANGELOG.md)
- [Commits](vuejs/vitepress@v0.12.2...v0.13.0)

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

Author: dependabot[bot]

docs/package-lock.json

@@ -17,7 +17,7 @@
     "postcss": "^8.2.8",
     "tailwindcss": "^2.0.4",
     "types-quill-delta": "^1.0.0",
-    "vitepress": "^0.12.2"
+    "vitepress": "^0.13.0"
   },
   "dependencies": {
     "@tailwindcss/custom-forms": "^0.2.1",