Updated GitHub Actions

.github/workflows/build.yml

@@ -6,17 +6,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0 # needed for accurate dates and blog plugin
       - name: Install Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: '3.11'
       - name: Install Poetry
         run: python3 -m pip install --upgrade poetry
       - name: Cache build data
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           key: mkdocs-cache-${{ runner.os }}-${{ hashFiles('**/poetry.lock', '**/mkdocs.yml') }}
           path: .cache