chore: update authing link

Author: yyx990803

themes/vue/_config.yml

@@ -13,7 +13,7 @@ platinum_sponsors_china:
     name: HBuilder
     description: An IDE for Vue
   - name: authing
-    url: https://authing.cn/welcome?from=vuejs
+    url: https://www.authing.cn/welcome?utm_source=Vuejs&utm_medium=CPT&utm_campaign=EN&utm_term=page-EN
     img: authing.svg
 platinum_sponsors:
   - url: >-