Pin new Windows CI job to windows-2022

[Copilot]

The Windows (x64, full) job in the new CI workflow fails before ModSecurity builds. The failure comes from Conan rebuilding yajl/2.1.0 on the windows-2025 image, where the newer VS/CMake toolchain is incompatible with YAJL’s legacy CMake scripts.

• Root cause

  • Quality Assurance new ran the Windows matrix on windows-2025.
  • That image pulled in a newer toolchain (Visual Studio 18 2026 in the failing log), which breaks YAJL during dependency build/configure.

• Change

  • Pin the Windows job in .github/workflows/ci_new.yml back to windows-2022.
  • This aligns the new workflow with the existing stable Windows CI environment and keeps the fix scoped to the failing job definition.

• Workflow diff

  build-windows:
    name: Windows (${{ matrix.platform.label }}, ${{ matrix.configure.label }})
    runs-on: windows-2022