ci: Update Python, os versions used in CI

Author: riddell-stan

.github/workflows/main.yml

@@ -8,17 +8,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-22.04]
-        python-version: ["3.10", "3.11"]
-        include:
-          - os: ubuntu-24.04
-            python-version: "3.12"
-          - os: macos-12
-            python-version: "3.10"
-          - os: macos-13
-            python-version: "3.11"
-          - os: macos-13
-            python-version: "3.12"
+        os: [ubuntu-24.04, macos-14]
+        python-version: ["3.12", "3.14"]
     steps:
       - name: Check out repository
         uses: actions/checkout@v4