ci: update Windows runners to windows-2025-vs2026 with Visual Studio 18 2026

Replace windows-2022 + "Visual Studio 17 2022" CMake generator with
windows-2025-vs2026 + "Visual Studio 18 2026" to test ahead of the
GitHub Actions migration rolling out June 8–15, 2026.

Also pin test-java-windows-x86_64 from windows-latest to windows-2025-vs2026
for consistency with the build jobs.

Author: bernardladenthin

.github/workflows/publish.yml

@@ -196,8 +196,8 @@ jobs:
           path: ${{ github.workspace }}/src/main/resources/net/ladenthin/llama/
 
   build-windows-x86_64:
-    name: Build and Test Windows 2022 x86_64
-    runs-on: windows-2022
+    name: Build and Test Windows 2025 x86_64 (VS 2026)
+    runs-on: windows-2025-vs2026
     steps:
       - uses: actions/checkout@v6
       - name: Display CPU Info
@@ -214,7 +214,7 @@ jobs:
       - name: Build libraries
         shell: cmd
         run: |
-          .github\build.bat -G "Visual Studio 17 2022" -A "x64" -DOS_NAME=Windows -DOS_ARCH=x86_64 -DBUILD_TESTING=ON
+          .github\build.bat -G "Visual Studio 18 2026" -A "x64" -DOS_NAME=Windows -DOS_ARCH=x86_64 -DBUILD_TESTING=ON
       - name: Run C++ unit tests
         run: ctest --test-dir build --output-on-failure
       - name: Upload artifacts
@@ -224,8 +224,8 @@ jobs:
           path: ${{ github.workspace }}/src/main/resources/net/ladenthin/llama/
 
   build-windows-x86:
-    name: Build and Test Windows 2022 x86
-    runs-on: windows-2022
+    name: Build and Test Windows 2025 x86 (VS 2026)
+    runs-on: windows-2025-vs2026
     steps:
       - uses: actions/checkout@v6
       - name: Display CPU Info
@@ -242,7 +242,7 @@ jobs:
       - name: Build libraries
         shell: cmd
         run: |
-          .github\build.bat -G "Visual Studio 17 2022" -A "Win32" -DOS_NAME=Windows -DOS_ARCH=x86 -DBUILD_TESTING=ON
+          .github\build.bat -G "Visual Studio 18 2026" -A "Win32" -DOS_NAME=Windows -DOS_ARCH=x86 -DBUILD_TESTING=ON
       - name: Run C++ unit tests
         run: ctest --test-dir build --output-on-failure
       - name: Upload artifacts
@@ -496,9 +496,9 @@ jobs:
           if-no-files-found: warn
 
   test-java-windows-x86_64:
-    name: Java Tests Windows Latest x86_64
+    name: Java Tests Windows 2025 x86_64
     needs: build-windows-x86_64
-    runs-on: windows-latest
+    runs-on: windows-2025-vs2026
     steps:
       - uses: actions/checkout@v6
       - name: Display CPU Info