Fix example README, fix Windows ARM64 libs path

Author: DataTriny

bindings/c/accesskit-config.cmake

@@ -14,7 +14,6 @@ elseif (WIN32)
         string(TOLOWER "${CMAKE_VS_PLATFORM_NAME}" LOWER_VS_PLATFORM_NAME)
         if ("${LOWER_VS_PLATFORM_NAME}" STREQUAL "arm64")
             set(_ACCESSKIT_ARCH "arm64")
-            set(_ACCESSKIT_TOOLCHAIN "")
         endif()
     endif()
 endif()

bindings/c/examples/windows/README.md

@@ -5,6 +5,6 @@ This example demonstrates how to integrate AccessKit into a C/C++ project using
 ## Building
 
 ```bash
-cmake -S . -B build -DACCESSKIT_DIR="../.." -DCMAKE_BUILD_TYPE=Release
-cmake --build build
+cmake -S . -B build -DACCESSKIT_DIR="../.."
+cmake --build build --config Release
 ```