Update nightly CI to offline-mode branches

Author: tyeth

.github/workflows/daily-update.yml

@@ -42,9 +42,9 @@ jobs:
           git submodule init
           git submodule update --recursive
           cd Wippersnapper_Boards
-          git reset --hard origin/rp2040_datalogger_feather
+          git reset --hard origin/offline-mode
           cd ../Wippersnapper_Components
-          git reset --hard origin/main
+          git reset --hard origin/offline-mode
           cd ..
           git add Wippersnapper_Boards Wippersnapper_Components
           git diff --staged --quiet || git commit -m "Update submodules to latest versions [skip ci]"