Fix actions workflow syntax

TheAssassin · TheAssassin · commit 5ae50e92b2e5 · 2021-10-28T14:14:47.000+02:00
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
@@ -6,7 +6,7 @@ on:
   workflow_dispatch:
   schedule:
     # build at least once a month
-    - '0 0 0 * *'
+    - cron: '0 0 0 * *'
 
 jobs:
   appimage-x86_64:
