update github workflow since github includes firefox & snaps in the default runner image, which causes the build to fail.

going to need a custom runner I guess...might as well only do actions on gitea.

.github/workflows/daily.yaml

@@ -3,7 +3,7 @@ on:
   push:
     branches: [ $default-branch ]
   schedule:
-    - cron: "0 7 * * *"   # daily 07:00
+    - cron: "0 7 * * 1"   # mondays at 07:00
   workflow_dispatch: {}
 
 jobs: