Update _pkgdown.yml

Author: dieghernan

_pkgdown.yml

@@ -11,7 +11,7 @@ development:
 navbar:
   structure:
     left:  [intro, reference, articles, news]
-    right: [search, packages, github]
+    right: [search, packages, github, donate]
   components:
     packages:
       text: "Packages"
@@ -30,4 +30,11 @@ navbar:
         href: https://dieghernan.github.io/pkgdev/
       - text: "resmush"
         href: https://dieghernan.github.io/resmush/
-
+    twitter:
+      icon: fa-brands fa-x-twitter
+      href: https://x.com/dhernangomez
+      aria-label: X (formerly Twitter)
+    donate:
+      icon: fa-hand-holding-dollar
+      href: https://ko-fi.com/dieghernan
+      aria-label: Buy me a coffee