Add Donate link to website

website/siteConfig.js

@@ -34,11 +34,12 @@ const siteConfig = {
   /* base url for editing docs, usage example: editUrl + 'en/doc1.md' */
   editUrl: `${GITHUB_URL}/edit/master/docs/`,
   headerLinks: [
-    { href: "/playground/", label: "Playground" },
     { doc: "index", label: "About" },
     { doc: "install", label: "Usage" },
+    { href: "/playground/", label: "Playground" },
     { blog: true, label: "Blog" },
     { search: true },
+    { href: "https://opencollective.com/prettier", label: "Donate" },
     { href: GITHUB_URL, label: "GitHub" }
   ],
   /* path to images for header/footer */