chore: add Handsontable as gold sponsor (#17451)

Author: patak-dev

docs/.vitepress/theme/composables/sponsor.ts

@@ -69,6 +69,11 @@ const viteSponsors: Pick<Sponsors, 'special' | 'gold'> = {
       url: 'https://huly.io/',
       img: '/huly.svg',
     },
+    {
+      name: 'Handsontable',
+      url: 'https://handsontable.com/docs/react-data-grid/?utm_source=vite_docs&utm_medium=sponsorship&utm_campaign=library_sponsorship_2024',
+      img: '/handsontable.svg',
+    },
   ],
 }