Bump vitepress from 1.3.4 to 1.4.0

Bumps [vitepress](https://github.com/vuejs/vitepress) from 1.3.4 to 1.4.0.
- [Release notes](https://github.com/vuejs/vitepress/releases)
- [Changelog](https://github.com/vuejs/vitepress/blob/main/CHANGELOG.md)
- [Commits](vuejs/vitepress@v1.3.4...v1.4.0)

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

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

package.json

@@ -21,7 +21,7 @@
     "markdown-it-imsize": "^2.0.1",
     "medium-zoom": "^1.1.0",
     "resolve-accept-language": "^3.1.8",
-    "vitepress": "^1.3.4"
+    "vitepress": "^1.4.0"
   },
   "dependencies": {}
 }