fix: EINVAL when spawning cmd files on Windows (#41905)

fix: EINVAL when spawning on Windows

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

script/run-if-exists.js

@@ -10,7 +10,8 @@ if (fs.existsSync(checkPath)) {
     command.slice(1),
     {
       stdio: 'inherit',
-      cwd: checkPath
+      cwd: checkPath,
+      shell: process.platform === 'win32'
     }
   );
   child.on('exit', code => process.exit(code));