chore: update content from upstream sources

- Updated Bluefin growth chart from ublue-os/countme
- Updated stream versions from latest releases
- Automated update via GitHub Actions

Author: castrojo

public/stream-versions.yml

@@ -1,7 +1,7 @@
 # Stream version information for Bluefin releases
 # This file contains the latest version information for each stream
 # Data is sourced from the most recent changelogs in ublue-os/bluefin and ublue-os/bluefin-lts repositories
-# Last updated: 2026-03-31
+# Last updated: 2026-04-07
 
 lts:
   base: "CentOS Stream 10"
@@ -13,6 +13,6 @@ lts:
 stable:
   base: "Fedora 43"
   gnome: "49.5-1"
-  kernel: "6.18.13-200"
+  kernel: "6.19.7-200"
   mesa: "25.3.6-6"
   nvidia: "595.58.03-1"