enable python 3.12 support in gh action

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9, '3.10', '3.11']
+        python-version: [3.9, '3.10', '3.11', '3.12']
 
     steps:
       - uses: actions/checkout@v4
@@ -42,10 +42,10 @@ jobs:
     - uses: actions/checkout@v4
       with:
         fetch-depth: 0
-    - name: Set up Python 3.9
+    - name: Set up Python 3.11
       uses: actions/setup-python@v5
       with:
-        python-version: 3.9
+        python-version: 3.11
     - name: Build a binary wheel and a source tarball
       run: |
         python -m pip install build --user
@@ -96,10 +96,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Set up Python 3.9
+      - name: Set up Python 3.11
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.11
       - name: Install sphinx-multiversion
         run:  python -m pip install sphinx-multiversion sphinx-autoapi
       - name: Create docs