Bump vitepress from 2.0.0-alpha.16 to 2.0.0-alpha.17 in /docs (NewFuture#686)

Bumps [vitepress](https://github.com/vuejs/vitepress) from 2.0.0-alpha.16 to 2.0.0-alpha.17.
- [Release notes](https://github.com/vuejs/vitepress/releases)
- [Changelog](https://github.com/vuejs/vitepress/blob/main/CHANGELOG.md)
- [Commits](vuejs/vitepress@v2.0.0-alpha.16...v2.0.0-alpha.17)

---
updated-dependencies:
- dependency-name: vitepress
  dependency-version: 2.0.0-alpha.17
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/package.json

@@ -10,6 +10,6 @@
     "build": "vitepress build ."
   },
   "devDependencies": {
-    "vitepress": "2.0.0-alpha.16"
+    "vitepress": "2.0.0-alpha.17"
   }
 }