Add Hacktoberfest to the Jumbotron

Scrolling list of highlighted items

content/_data/indexpage/carousel.yml

@@ -1,3 +1,15 @@
+# Hacktoberfest 2024
+- :href: https://hacktoberfest.com/
+  :title: Hacktoberfest 2024
+  :intro: Jenkins is participating in Hacktoberfest 2024. We are seeking contributors
+    and maintainers who want to join us to improve Jenkins in October!
+  :image:
+    :src: /images/hacktoberfest/hacktoberfest_2024_social_600x300.png
+    :height: 300px
+  :call_to_action:
+    :text: More info
+    :href: "/events/hacktoberfest/"
+
 # Jenkins 2024 board and officer elections
 - :href: /blog/2024/09/25/board-officer-election-announcement/
   :title: Voter registration for Jenkins Elections 2024