[CONFIG] [Github Actions] gitleaks better comments

Author: Gonzalo Diaz

.github/workflows/gitleaks.yml

@@ -7,6 +7,15 @@ on: # yamllint disable-line rule:truthy
   push:
   workflow_dispatch:
   schedule:
+    #        ┌───────────── minute (0 - 59)
+    #        │  ┌───────────── hour (0 - 23)
+    #        │  │ ┌───────────── day of the month (1 - 31)
+    #        │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #        │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        │  │ │ │ │
+    #        *  * * * *
     - cron: "0 4 * * *" # run once a day at 4 AM
 jobs:
   scan: