Update .github/workflows/external-contributors.yml

Co-authored-by: Francesco Gringl-Novy <francesco.novy@sentry.io>

Author: Lms24

.github/workflows/external-contributors.yml

@@ -23,7 +23,6 @@ jobs:
       - uses: actions/checkout@v7
         with:
           ref: develop
-          allow-unsafe-pr-checkout: true
       - name: Set up Node
         uses: actions/setup-node@v6
         with: