Add Python version 3.14.0-rc.2 to CI workflow

Author: mindflayer

.github/workflows/main.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-24.04
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13', 'pypy3.10']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14.0-rc.2', 'pypy3.10']
     env:
       # Configure a constant location for the uv cache
       UV_CACHE_DIR: /tmp/.uv-cache