Tests/RunCMake/GeneratorToolset: Fix Visual Studio 18 2026 host arch on ARM64

This was missed in commit 3392b371e2 (VS: Add Visual Studio 18 2026
generator, 2025-08-20, v4.2.0-rc1~165^2~1).

Tests/RunCMake/GeneratorToolset/TestToolsetHostArchNone.cmake

@@ -6,7 +6,7 @@ if(CMAKE_GENERATOR MATCHES "Visual Studio 1[678]")
   cmake_host_system_information(RESULT is_64_bit QUERY IS_64BIT)
   if(is_64_bit)
     if("${CMAKE_HOST_SYSTEM_PROCESSOR}" STREQUAL "ARM64")
-      if(CMAKE_GENERATOR STREQUAL "Visual Studio 17 2022")
+      if(CMAKE_GENERATOR MATCHES "Visual Studio 1[78] ")
         if(NOT "${CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE}" STREQUAL "ARM64")
           message(FATAL_ERROR "CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE is not 'ARM64' as expected.")
         endif()