feat: update footer links and i18n

- Link Donate directly to Enthuse instead of /donate page
- Use i18n keys for Job Board, Volunteer, Fundraise, Donate, Buy us a coffee
- Use buy_us_a_coffee i18n key (fixes i18n regression)

Author: mroderick

app/views/layouts/_footer.html.haml

@@ -28,14 +28,11 @@
           %li= link_to t("navigation.coaches"), coaches_path
           %li= link_to t("navigation.sponsors"), sponsors_path
           %li= link_to t("navigation.events"), upcoming_events_path
-          %li= link_to t("navigation.jobs"), "https://jobs.codebar.io/"
-          %li= link_to "Volunteer", volunteer_path
-          %li= link_to "Fundraise", fundraise_path
-          %li.active= link_to t("navigation.donate"), donate_path
-          %li
-            = link_to 'https://buymeacoffee.com/codebarhq', target: '_blank', rel: 'noopener noreferrer' do
-              %i.fas.fa-coffee.me-2
-              Buy us a coffee
+          %li= link_to t("navigation.job_board"), "https://jobs.codebar.io/"
+          %li= link_to t("navigation.volunteer"), volunteer_path
+          %li= link_to t("navigation.fundraise"), fundraise_path
+          %li.active= link_to t("navigation.donate"), "https://enthuse.com/@codebar/donate", target: '_blank', rel: 'noopener noreferrer'
+          %li= link_to t("navigation.buy_us_a_coffee"), 'https://buymeacoffee.com/codebarhq', target: '_blank', rel: 'noopener noreferrer'
 
       .col-sm-12.col-md-6.col-lg-3
         = render partial: 'shared/social_media'