correct appveyor arm64 build config for PYTHONBUILDDIR_ARM64

Author: chcg

appveyor.yml

@@ -46,7 +46,7 @@ after_build:
 
     - cd "%APPVEYOR_BUILD_FOLDER%"\installer
     - dotnet tool install --global wix
-    - if "%platform_input%"=="ARM64" SET PYTHONBUILDDIR_X64="%APPVEYOR_BUILD_FOLDER%"\packages\python.3.14.3\tools
+    - if "%platform_input%"=="ARM64" SET PYTHONBUILDDIR_ARM64="%APPVEYOR_BUILD_FOLDER%"\packages\pythonarm64.3.14.3\tools
     - if "%platform_input%"=="x64" SET PYTHONBUILDDIR_X64="%APPVEYOR_BUILD_FOLDER%"\packages\python.3.14.3\tools
     - if "%platform_input%"=="Win32" SET PYTHONBUILDDIR="%APPVEYOR_BUILD_FOLDER%"\packages\pythonx86.3.14.3\tools
     - copy "%APPVEYOR_BUILD_FOLDER%"\installer\buildPaths.bat.orig "%APPVEYOR_BUILD_FOLDER%"\installer\buildPaths.bat