docs: borrow python version from docs/pyproject.toml

Author: dkropachev

.github/workflows/docs-pages.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version-file: docs/pyproject.toml
 
       - name: Set up env
         run: make -C docs setupenv

.github/workflows/docs-pr.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version-file: docs/pyproject.toml
 
       - name: Set up env
         run: make -C docs setupenv