CI: Removed persist-credentials: false from checkout action

For some reason, this causes the haxe LS download to fail.
We might want to investigate this in the future

.github/workflows/pytest.yml

@@ -21,8 +21,6 @@ jobs:
         python-version: ["3.11"]
     steps:
       - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
       - name: Free disk space
         if: runner.os == 'Linux'
         run: |