Fix CI test matrix

Author: dandavison

.github/workflows/ci.yml

@@ -16,8 +16,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.9", "3.13"]
-        os: [ubuntu-latest, ubuntu-arm, macos-intel, macos-arm, windows-latest]
+        python: ["3.9", "3.13", "3.14"]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         include:
           # On 3.9 there is a problem with import errors caused by pytests' loader that surface due
           # to a bug in CPython (https://github.com/python/cpython/issues/91351), so we avoid using