fix link

Author: yyx990803

themes/vue/_config.yml

@@ -10,7 +10,7 @@ platinum_sponsors:
     img: tooltwist.png
   - url: https://vueschool.io/?utm_source=Vuejs.org&utm_medium=Banner&utm_campaign=Sponsored%20Banner&utm_content=V1
     img: vueschool.png
-  - url: https://datacamp.com/careers?utm_source=vuejs&utm_medium=sidebar
+  - url: https://www.datacamp.com/careers?utm_source=vuejs&utm_medium=sidebar
     img: datacamp.png
 
 gold_sponsors: