chore: add alert

docs/index.rst

@@ -24,11 +24,21 @@
 
   <div class="topics-grid topics-grid--scrollable grid-container full">
 
+.. alert::
+  :link: https://www.scylladb.com/2024/12/18/why-were-moving-to-a-source-available-license/
+  :target: _blank
+  :link_text: Learn more about the change
+  :icon: logs
+
+   We’re updating our license & versioning policy
+
+.. raw:: html
+
   <div class="grid-x grid-margin-x hs">
 
 .. topic-box::
   :title: Getting started
-  :icon: icon-docs-getting-started
+  :icon: icon-rocket
   :link: https://docs.scylladb.com/stable/get-started/
   :link_target: _self
   :class: large-4 getting-started-card