Bump vitepress from 0.14.1 to 0.16.1

Bumps [vitepress](https://github.com/vuejs/vitepress) from 0.14.1 to 0.16.1.
- [Release notes](https://github.com/vuejs/vitepress/releases)
- [Changelog](https://github.com/vuejs/vitepress/blob/master/CHANGELOG.md)
- [Commits](vuejs/vitepress@v0.14.1...v0.16.1)

---
updated-dependencies:
- dependency-name: vitepress
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -103,7 +103,7 @@
     "serve-handler": "^6.1.3",
     "typescript": "^4.3.5",
     "vite": "~2.3.0",
-    "vitepress": "^0.14.1",
+    "vitepress": "^0.16.1",
     "vue": "^3.2.0",
     "vue-tsc": "^0.2.3",
     "yorkie": "^2.0.0"