Copilot cannot launch from WSL after upgrading to `1.0.64` from PowerShell

### Describe the bug

I use GitHub Copilot in both Windows (from PowerShell) and WSL.

This morning I updated the Windows installation to `1.0.64`. The Windows version is working fine after the update.

However, the WSL installation cannot launch. The error message is

```bash
$ copilot
Failed to load package index: /home/shengjiema/.cache/copilot/pkg/linux-x64/1.0.64-1/index.js SyntaxError: Invalid or unexpected token
at compileSourceTextModule (node:internal/modules/esm/utils:318:16)
at ModuleLoader.moduleStrategy (node:internal/modules/esm/translators:90:18)
at #translate (node:internal/modules/esm/loader:435:20)
at afterLoad (node:internal/modules/esm/loader:491:29)
at ModuleLoader.loadAndTranslate (node:internal/modules/esm/loader:496:12)
at #getOrCreateModuleJobAfterResolve (node:internal/modules/esm/loader:549:36)
at afterResolve (node:internal/modules/esm/loader:597:52)
at ModuleLoader.getOrCreateModuleJob (node:internal/modules/esm/loader:603:12)
at node:internal/modules/esm/loader:622:32
at TracingChannel.tracePromise (node:diagnostics_channel:362:14)
```

### Affected version

`copilot --version` does not work in WSL, but the Windows installation says `GitHub Copilot CLI 1.0.64.`

### Steps to reproduce the behavior

_No response_

### Expected behavior

_No response_

### Additional context

_No response_

首先，在 WSL 中使用版本 `1.0.64` 重現 `copilot`，並檢查錯誤中參照的快取檔案 `linux-x64/1.0.64-1/index.js`。將 WSL 的行為與正常運作的 PowerShell 安裝進行比較；完成標準是 `copilot` 能在 WSL 中啟動，且 `copilot --version` 能正常運作。

由索引模型根據 Issue 內容生成。