Update builder.py

Author: Behemyth

cppython/plugins/cmake/builder.py

@@ -29,7 +29,7 @@ def generate_provider_preset(provider_data: CMakeSyncData) -> CMakePresets:
 
         if provider_data.toolchain:
             # Use the toolchainFile field for better integration
-            generated_configure_preset.toolchainFile = str(provider_data.toolchain.as_posix())
+            generated_configure_preset.toolchainFile = provider_data.toolchain
 
         if cache_variables:
             generated_configure_preset.cacheVariables = cache_variables