Update Windows-aarch64.cmake

Add `swift-syntax-lib` to the distribution image for ARM64

(cherry picked from commit 27c09fc)

Author: compnerd

cmake/caches/Windows-aarch64.cmake

@@ -152,6 +152,7 @@ set(SWIFT_INSTALL_COMPONENTS
       sourcekit-inproc
       swift-remote-mirror
       swift-remote-mirror-headers
+      swift-syntax-lib
     CACHE STRING "")
 
 set(LLVM_DISTRIBUTION_COMPONENTS