Fix 3.14 spelling for setup-python action.

Author: jsirois

.github/workflows/ci.yml

@@ -37,13 +37,13 @@ jobs:
           - os: ubuntu-24.04
             python-version: "3.13"
           - os: ubuntu-24.04
-            python-version: "3.14"
+            python-version: "3.14.0-rc.1"
 
           - os: macos-15
-            python-version: "3.14"
+            python-version: "3.14.0-rc.1"
 
           - os: windows-2022
-            python-version: "3.14"
+            python-version: "3.14.0-rc.1"
     steps:
       - name: Checkout dev-cmd
         uses: actions/checkout@v4