feat(ci): set fetch-depth: 0 in trufflehog checkout step (#79)

This should prevent the issues happening randomly on some commits when
bash was having issues escaping some characters.

.github/workflows/secrets-leak.yml

@@ -9,20 +9,9 @@ jobs:
   trufflehog:
     runs-on: ubuntu-latest
     steps:
-      - shell: bash
-        run: |
-          if [ "${{ github.event_name }}" == "push" ]; then
-            echo "depth=$(($(jq length <<< '${{ toJson(github.event.commits) }}') + 2))" >> $GITHUB_ENV
-            echo "branch=${{ github.ref_name }}" >> $GITHUB_ENV
-          fi
-          if [ "${{ github.event_name }}" == "pull_request" ]; then
-            echo "depth=$((${{ github.event.pull_request.commits }}+2))" >> $GITHUB_ENV
-            echo "branch=${{ github.event.pull_request.head.ref }}" >> $GITHUB_ENV
-          fi
       - name: Checkout code
         uses: actions/checkout@v4
         with:
-          ref: ${{env.branch}}
-          fetch-depth: ${{env.depth}}
+          fetch-depth: 0
       - name: Secret Scanning
         uses: trufflesecurity/trufflehog@main