try skip docs build for 3.9

Author: SamFerracin

.github/workflows/ci.yml

@@ -48,10 +48,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Set up Python 3.9
+      - name: Set up Python 3.10
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: '3.10'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip

tox.ini

@@ -35,7 +35,6 @@ commands =
   asv run {posargs}
 
 [testenv:docs]
-basepython = python3.10
 envdir = .tox/docs
 deps =
   -e .[dev]