Refactor GitHub Actions workflow to use latest version of actions/che…

…ckout and actions/setup-python

.github/workflows/gh-deploy.yml

@@ -12,10 +12,10 @@ jobs:
         python-version: [ 3.11 ]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Checkout private tools
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: squidfunk/mkdocs-material-insiders
           token: ${{ secrets.GH_TOKEN_MKDOCS }}
@@ -34,12 +34,12 @@ jobs:
           fi         
         
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
           architecture: x64 
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           key: ${{ github.ref }}
           path: .cache