Fix link in frontpage that was directing to Open Collective, replace it by our own doantions page

Author: conradolandia

src/lib/config/data/frontpage.yaml

@@ -86,5 +86,5 @@
       link: https://github.com/spyder-ide/spyder
       aspect: xl:aspect-square
     - icon: BsHeartFill
-      link: https://opencollective.com/spyder
+      link: https://www.spyder-ide.org/donate
       aspect: xl:aspect-square