chore(deps-dev): bump vitepress from 1.0.0-beta.7 to 1.0.0-rc.20 (#194)

Bumps [vitepress](https://github.com/vuejs/vitepress) from 1.0.0-beta.7 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-beta.7...v1.0.0-rc.20)

---
updated-dependencies:
- dependency-name: vitepress
  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>

package.json

@@ -31,7 +31,7 @@
     "timezone-mock": "^1.3.6",
     "typescript": "^5.2.2",
     "vite": "^4.4.9",
-    "vitepress": "1.0.0-beta.7",
+    "vitepress": "1.0.0-rc.20",
     "yaml": "^2.3.2"
   },
   "workspaces": [