change gitleaks fetch depth to 2

.github/workflows/gitleaks_scan.yml

@@ -3,16 +3,14 @@ on:
   pull_request:
   push:
   workflow_dispatch:
-  schedule:
-    - cron: "0 4 * * *" # run once a day at 4 AM
 jobs:
   scan:
     name: gitleaks
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
         with:
-          fetch-depth: 0
+          fetch-depth: 2
       - uses: gitleaks/gitleaks-action@v2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}