Use Python 3.13 in CI test matrix

Author: b3b

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        python-version: ["3.10", "3.12", "3.14"]
+        python-version: ["3.10", "3.12", "3.13"]
 
     steps:
       - uses: actions/checkout@v6