chore: update CI for the docs

.github/workflows/build.yml

@@ -16,18 +16,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.13'
+          cache: 'pip'
       - name: Install dependencies
-        run: |
-          set -x
-          python -m pip install --upgrade pip
-          pip install -r requirements.txt
+        run: pip install -r requirements.txt
       - name: Build
         run: mkdocs build
       - name: Upload artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: docs
           path: site