Specify python version in build docs

.github/workflows/docs.yml

@@ -16,6 +16,13 @@ jobs:
     steps:
     - name: Checkout repo content
       uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Set up Python 3.11
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.11
 
     - name: Install dependencies
       run: |