Adds GH and Twitter links

Author: dthyresson

app/lib/footer.tsx

@@ -7,7 +7,7 @@ export function Footer() {
     social: [
       {
         name: "Twitter",
-        href: "#",
+        href: "https://twitter.com/supabase",
         icon: (props: any) => (
           <svg fill="currentColor" viewBox="0 0 24 24" {...props}>
             <path d="M8.29 20.251c7.547 0 11.675-6.253 11.675-11.675 0-.178 0-.355-.012-.53A8.348 8.348 0 0022 5.92a8.19 8.19 0 01-2.357.646 4.118 4.118 0 001.804-2.27 8.224 8.224 0 01-2.605.996 4.107 4.107 0 00-6.993 3.743 11.65 11.65 0 01-8.457-4.287 4.106 4.106 0 001.27 5.477A4.072 4.072 0 012.8 9.713v.052a4.105 4.105 0 003.292 4.022 4.095 4.095 0 01-1.853.07 4.108 4.108 0 003.834 2.85A8.233 8.233 0 012 18.407a11.616 11.616 0 006.29 1.84" />
@@ -16,7 +16,7 @@ export function Footer() {
       },
       {
         name: "GitHub",
-        href: "#",
+        href: "https://github.com/supabase-community/supabase-graphql-example",
         icon: (props: any) => (
           <svg fill="currentColor" viewBox="0 0 24 24" {...props}>
             <path