Add expression for fetch depth

Author: vgrassia

.github/workflows/workflow-linter.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           repository: ${{ github.repository }}
-          fetch-depth: 0
+          fetch-depth: ${{ github.event_name == 'pull_request' && 2 || 0 }}
 
       # - name: Get changed files
       #   id: changed-workflows