Unable to sync with github account

I'm not being able to sync my vscode account.
Fedora Silverblue 33.

1. Turn on settings on sync.
2. On warning window, click in "turn on".
3. Sign in & Turn on
4. Sign in with GitHub
5. Login request redirecs to the browser (Mozilla Firefox in my case)
6. Authorize visual studio to access github.
7. Contunue
7. Browser shows "Authorization was successful. You will be redirected back to Visual Studio Code", but the request is not automatically redirected.
8. Follow the screen's instructions. Copy "Your authorization token"
9. Go back to Vs Code and click in "signing in to github.com". (Purple bar on window's bottom).
10. Paste token into the textbox at top of window and hit "enter".
11. Nothing happens. The message "Signing in to github.com" keeps at window's bottom and syncing process does't happen.

首先，在 Fedora Silverblue 33 上的 Visual Studio Code 中重现 GitHub 登录和 settings-sync 流程，并使用 Firefox 进行浏览器重定向。检查授权和 token 输入后的交接；登录完成且 settings sync 开始后，该 issue 即完成。

由索引模型根据 Issue 内容生成。