typo on yml

Author: craff

.github/workflows/main.yml

@@ -3,10 +3,10 @@ name: build
 on:
   pull_request:
   push:
-    - branches: [master]
+    branches: [master]
   schedule:
     # Prime the caches every Monday
-    - cron: 0 1 * * MON
+    - cron: '0 1 * * MON'
 
 jobs:
   build: