fix(deps): update dependency vuepress to v2.0.0-rc.4

Author: renovate[bot]

package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@vuepress/client": "2.0.0-rc.0",
     "vue": "^3.3.13",
-    "vuepress": "2.0.0-rc.0",
+    "vuepress": "2.0.0-rc.4",
     "vuepress-plugin-search-pro": "2.0.0-rc.6",
     "vuepress-theme-hope": "2.0.0-rc.6"
   },