add 3.14 to the testing matrix

Author: fbordeu

.github/workflows/testing.yml

@@ -38,7 +38,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.11", "3.12", "3.13"]
+        python-version: ["3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - name: Checkout code