Bump actions/checkout from 4 to 5 (#566)

Author: dependabot[bot]

.github/workflows/CleanPreviewDoc.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: gh-pages
       - name: Delete preview(s) and reset history