ci(actions): Update workflow setup actions

Bump GitHub Actions checkout, setup-node, and setup-python to
Node 24-compatible major versions across the maintained workflows.
This removes the runner deprecation warning without changing the
workflow logic itself.

.github/workflows/pages.yml.disabled

@@ -23,10 +23,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: "lts/*"
           cache: "npm"