Test pinball against stable with cron

.github/workflows/main.yaml

@@ -4,14 +4,20 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
   
-on: [pull_request, push]
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * *" # Every day at midnight
 
 jobs:
   build:
     uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/flutter_package.yml@v1
     with:
       flutter_channel: stable
-      flutter_version: 2.10.5
       coverage_excludes: "lib/gen/*.dart"
       test_optimization: false