ci: use latest windows on GitHub Actions

Author: henryborchers

.github/workflows/tox_matrix.yml

@@ -10,12 +10,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-2019]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ['3.10', '3.11', '3.12', '3.13']
-        include:
-          - os: macos-latest
-          - os: ubuntu-latest
-          - os: windows-2019
       fail-fast: false
     name: Python ${{ matrix.python-version }} ${{ matrix.os }} build
     steps: