Point the spike at the SDK's msys2 tool directory

bison.exe lives in msys2\usr\bin, not usr\bin.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013j6ePxd1BobZkr8YVLnNet

Author: ondrejmirtes

.github/workflows/turbo-windows-spike.yml

@@ -72,7 +72,7 @@ jobs:
         working-directory: turbo-ext
         run: |
           for /d %%d in (C:\php-devel\php-*-devel-*) do set DEVEL=%%d
-          set PATH=%DEVEL%;C:\php-sdk\bin;C:\php-sdk\usr\bin;%PATH%
+          set PATH=%DEVEL%;C:\php-sdk\bin;C:\php-sdk\msys2\usr\bin;%PATH%
           call phpize.bat
           if errorlevel 1 exit /b 1
           call configure.bat --enable-phpstan-turbo