Update vitepress to 1.0.0-rc.20

Author: limpo1989

package-lock.json

@@ -11,7 +11,7 @@
     "@iconify-json/ph": "^1.1.5",
     "@iconify-json/twemoji": "^1.1.11",
     "@iconify-json/vscode-icons": "^1.1.25",
-    "vitepress": "^1.0.0-rc.15",
+    "vitepress": "^1.0.0-rc.20",
     "vue": "^3.3.4"
   },
   "devDependencies": {