Use persist-credentials option for actions/checkout

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: alexdewar

.github/workflows/pre-commit-autoupdate.yml

@@ -14,6 +14,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
+        with:
+          persist-credentials: false
       - uses: actions/setup-python@v5
       - uses: browniebroke/pre-commit-autoupdate-action@1
       - uses: peter-evans/create-pull-request@v7