docs: bump vitepress

Author: yyx990803

package.json

@@ -70,7 +70,7 @@
     "typescript": "~4.5.5",
     "verdaccio": "^5.0.1",
     "vite-plugin-pwa": "^0.11.3",
-    "vitepress": "^0.20.1",
+    "vitepress": "^0.22.4",
     "webpack": "^5.54.0",
     "yorkie": "^2.0.0"
   },