chore(deps): update dependency vuepress-theme-hope to v2.0.0-rc.81

Author: renovate[bot]

package.json

@@ -20,6 +20,6 @@
     "vuepress": "2.0.0-rc.18",
     "vuepress-plugin-md-enhance": "2.0.0-rc.57",
     "vuepress-plugin-search-pro": "2.0.0-rc.57",
-    "vuepress-theme-hope": "2.0.0-rc.58"
+    "vuepress-theme-hope": "2.0.0-rc.81"
   }
 }