chore: update sponsors (#2785)

Author: vue-bot

themes/vue/_config.yml

@@ -119,6 +119,15 @@ gold_sponsors:
   - url: 'https://litslink.com'
     img: litslink.png
     name: LITSLINK
+  - url: 'https://newicon.net'
+    img: newicon.png
+    name: Newicon
+  - url: 'https://lowdefy.com?k=w432'
+    img: lowdefy.png
+    name: Lowdefy
+  - url: 'https://quickbookstoolhub.com/'
+    img: quickbooks_tool_hub.png
+    name: Quickbooks Tool Hub
 silver_sponsors:
   - url: 'https://roadster.com'
     img: roadster.png