workflows: fix zizmor findings (part 1) (#190)

Signed-off-by: Patrick Linnane <patrick@linnane.io>

.github/workflows/docs-deploy.yml

@@ -17,6 +17,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3