Upgrade Windows build server

Author: robbr48

.github/workflows/ci-build.yaml

@@ -5,7 +5,7 @@ on: [pull_request]
 jobs:
   cmake-mingw:
     timeout-minutes: 5
-    runs-on: windows-2019
+    runs-on: windows-2025
     steps:
       - uses: actions/setup-python@v5
         with:
@@ -39,7 +39,7 @@ jobs:
 
   cmake-msvc2019:
     timeout-minutes: 5
-    runs-on: windows-2019
+    runs-on: windows-2025
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -51,7 +51,7 @@ jobs:
       - name: Configure
         working-directory: fmi4c-build
         shell: cmd
-        run: cmake -DFMI4C_BUILD_TEST=ON -DCMAKE_BUILD_TYPE=Release -G"Visual Studio 16 2019" ..
+        run: cmake -DFMI4C_BUILD_TEST=ON -DCMAKE_BUILD_TYPE=Release -G"Visual Studio 17 2022" ..
 
       - name: Build
         working-directory: fmi4c-build
@@ -99,7 +99,7 @@ jobs:
     steps:
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.12'
+          python-version: '3.11'
 
       - name: Checkout
         uses: actions/checkout@v3
@@ -120,4 +120,4 @@ jobs:
 
       - name: Test
         working-directory: fmi4c-build/test
-        run: python pytest.py
+        run: python pytest.py