chore: new sponsor

Author: yyx990803

themes/vue/_config.yml

@@ -28,6 +28,9 @@ platinum_sponsors:
   - url: https://vehikl.com/
     img: vehikl.png
     name: vehikl
+  - url: https://www.nativescript.org/vue?utm_source=vue-js-org&utm_medium=website&utm_campaign=nativescript-awareness
+    img: nativescript.png
+    name: nativescript
 
 gold_sponsors:
   - url: https://www.vuemastery.com/