Update .github/workflows/system_tests.yml

Co-authored-by: Charles de Beauchesne <charles.debeauchesne@datadoghq.com>

Author: nccatoni

.github/workflows/system_tests.yml

@@ -8,7 +8,7 @@ on:
     branches:
       - "**"
   schedule:
-    - cron:  '00 03 * * 1-5'
+    - cron:  '00 03 * * *'
 
 jobs:
   build: