feat(update-modal): display last 5 release notes instead of single

- Modified backend to fetch last 5 releases from GitHub API
- Updated frontend to iterate through and display multiple releases
- Added latest badge and publish date styling
- Added update.latestBadge translation key to all locales
- Maintains backward compatibility for single changelog display

static/css/components/update-modal.css

@@ -1,8 +1,4 @@
 /* Update Modal Styles */
-.update-modal {
-    max-width: 600px;
-}
-
 .update-header {
     display: flex;
     align-items: center;