Fix MSVC test failure on windows-2025 (#166)

Author: kimwalisch

.github/workflows/full_build.yml

@@ -80,7 +80,7 @@ jobs:
           - os: windows-2022
             generator: Visual Studio 17 2022
           - os: windows-2025
-            generator: Visual Studio 17 2022
+            generator: Visual Studio 18 2026
           # clang-cl requires the toolset flag be set correctly 
           - cpp_compiler: clang-cl.exe
             toolset: ClangCL