CI, minor: remove junie workflow, use persist-credentials: false on checkout action

.github/workflows/docs.yaml

@@ -20,6 +20,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Set up Python
         uses: actions/setup-python@v5