Update github action for doc builds

Straight copy from datalad-next

.github/workflows/docbuild.yml

@@ -12,11 +12,11 @@ jobs:
       run: |
         git config --global user.email "test@github.land"
         git config --global user.name "GitHub Almighty"
-    - uses: actions/checkout@v1
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v1
+    - uses: actions/checkout@v3
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v4
       with:
-        python-version: 3.8
+        python-version: '3.10'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip