add shell true to avoid error

Author: Hweinstock

packages/core/scripts/test/launchTestUtilities.ts

@@ -185,6 +185,7 @@ async function invokeVSCodeCli(vsCodeExecutablePath: string, args: string[]): Pr
     const spawnResult = proc.spawnSync(cli, cmdArgs, {
         encoding: 'utf-8',
         stdio: 'pipe',
+        shell: true,
     })
 
     if (spawnResult.status !== 0) {