fix(deps): update vuepress monorepo

Author: renovate[bot]

package.json

@@ -12,10 +12,10 @@
   },
   "dependencies": {
     "@vuepress/bundler-vite": "2.0.0-rc.9",
-    "@vuepress/plugin-search": "2.0.0-rc.21",
+    "@vuepress/plugin-search": "2.0.0-rc.63",
     "@vuepress/plugin-shiki": "2.0.0-rc.21",
     "vue": "3.4.21",
-    "vuepress": "2.0.0-rc.9",
+    "vuepress": "2.0.0-rc.18",
     "vuepress-theme-hope": "2.0.0-rc.32"
   },
   "packageManager": "pnpm@8.15.5",