prevent persisting credentials

Author: jakmagaud

.github/workflows/check-links-external.yml

@@ -24,6 +24,8 @@ jobs:
       fail-fast: false
     steps:
       - uses: actions/checkout@v2
+        with:
+          persist-credentials: false
       - name: Ruby
         uses: ruby/setup-ruby@v1
         with:
@@ -46,4 +48,4 @@ jobs:
           title: Broken Links Report - External
           content-filepath: ./broken_links.md
           repository: ${{ env.REPORT_REPOSITORY }}
-          labels: ${{ env.REPORT_LABEL }}
+          labels: ${{ env.REPORT_LABEL }}