setup python 12 in action

Author: kaizhi-singtown

.github/workflows/build.yml

@@ -40,6 +40,10 @@ jobs:
     name: Build ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
     steps:
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.12
       - if: matrix.node
         uses: actions/setup-node@v4
         with: