Fix cron expression

Author: Planeshifter

.github/workflows/test_install.yml

@@ -26,7 +26,7 @@ on:
     types: [completed]
   schedule:
     # * is a special character in YAML so you have to quote this string
-    - cron:  '30 90 * * 2
+    - cron:  '30 21 * * 2'
 
 # Workflow jobs:
 jobs: