fix(deps): update dependency @vuepress/shared

Author: renovate[bot]

package.json

@@ -18,7 +18,7 @@
     "@types/three": "0.158.1",
     "@vue/repl": "2.6.1",
     "@vuepress/client": "2.0.0-beta.67",
-    "@vuepress/shared": "2.0.0-beta.67",
+    "@vuepress/shared": "2.0.0-beta.68",
     "@vuepress/utils": "2.0.0-beta.67",
     "@vueuse/core": "10.5.0",
     "artplayer": "5.0.9",
@@ -38,7 +38,7 @@
     "vuepress": "2.0.0-beta.67",
     "vuepress-plugin-copy-code2": "2.0.0-beta.243",
     "vuepress-plugin-search-pro": "2.0.0-beta.243",
-    "vuepress-shared": "2.0.0-beta.243",
+    "vuepress-shared": "2.0.0-beta.247",
     "vuepress-theme-hope": "2.0.0-beta.243"
   }
 }