Bump Python version for RC testing

Author: pllim

.github/workflows/predeps_workflow.yml

@@ -23,8 +23,8 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b  # v5.3.0
       with:
-        python-version: '3.10'
+        python-version: '3.12'
     - name: Install and build
       run: python -m pip install tox --upgrade
     - name: Run tests
-      run: tox -e py310-test-predeps
+      run: tox -e py312-test-predeps