chore(deps): update ghcr.io/ublue-os/silverblue-main:latest docker digest to 239cbed (#4094)

Co-authored-by: ubot-7274[bot] <217212047+ubot-7274[bot]@users.noreply.github.com>

Author: ubot-7274[bot]

image-versions.yml

@@ -2,7 +2,7 @@ images:
   - name: silverblue-main
     image: ghcr.io/ublue-os/silverblue-main
     tag: latest
-    digest: sha256:9a31b4addd717788b5c134a81df87fe57aa389334b09122723b6a61b92916428
+    digest: sha256:239cbed61148e628e1e9d308686c803e8594aa2b71d85b1f0d2e1de43e4058fb
   - name: common
     image: ghcr.io/projectbluefin/common
     tag: latest