Replace EOL windows-2019 CI build and add windows-2025 (#321)

Author: offa

.github/workflows/ci.yml

@@ -84,8 +84,8 @@ jobs:
     strategy:
       matrix:
         msvc_version:
-          - 2019
           - 2022
+          - 2025
     name: "Windows ${{ matrix.msvc_version }} MSVC"
     steps:
       - uses: actions/checkout@main