update Checkout

.github/workflows/snyk.yml

@@ -14,9 +14,9 @@ on:
   workflow_dispatch:
     inputs:
       pr_number:
-        description: 'Pull Request number to run the workflow on (for fork PRs)'
+        description: "Pull Request number to run the workflow on (for fork PRs)"
         required: false
-        default: ''
+        default: ""
 
 permissions:
   contents: read
@@ -59,9 +59,7 @@ jobs:
 
       - uses: actions/checkout@v4
         with:
-          ref: |
-            ${{ github.event.pull_request.merge_commit_sha || 
-                (github.event_name == 'workflow_dispatch' && inputs.pr_number != '' ? 'refs/pull/' + inputs.pr_number + '/head' : github.ref) }}
+          ref: ${{ github.event_name == 'workflow_dispatch' && inputs.pr_number != '' && format('refs/pull/{0}/head', inputs.pr_number) || github.event.pull_request.merge_commit_sha || github.ref }}
 
       - uses: ./.github/actions/setup
         with: