fix(build): set VULKAN_SDK environment variable for Windows testing

Author: Gioee

.github/workflows/main.yml

@@ -512,6 +512,8 @@ jobs:
         if: matrix.name == 'windows'
         run: make test ${{ matrix.make && matrix.make || ''}}
         shell: msys2 {0}
+        env:
+          VULKAN_SDK: "C:/msys64/mingw64"
 
       - name: test sqlite-ai
         if: matrix.name == 'linux' || matrix.name == 'macos'