CI: Use specific Python 3.14.0-rc.3 version for testing

Author: cxzhong

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ['macos-13', 'macos-latest', 'ubuntu-latest', 'windows-latest']
-        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14.0-rc.3']
     steps:
     - name: Set up the repository
       uses: actions/checkout@v4