chore: followRedirect default value is true (#487)

代码注释是对的，但是 readme 里的是错误的。
**readme：**

![image](https://github.com/node-modules/urllib/assets/77064828/7c4317d5-0659-41c3-af02-e5fa99714915)
**代码：**

![image](https://github.com/node-modules/urllib/assets/77064828/5e9661af-97d8-4384-bc42-0f638705317e)

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这里也写了个小 demo 验证了一番，确认 followRedirect 的默认值是 true：
https://github.com/SanGuiChen/urllib-redirect-demo

Co-authored-by: xuming.cx <xuming.cx@antgroup.com>

README.md

@@ -68,7 +68,7 @@ console.log('status: %s, body size: %d, headers: %j', res.status, data.length, r
   - **keepAliveTimeout** `number | null` - Default is `4000`, 4 seconds - The timeout after which a socket without active requests will time out. Monitors time between activity on a connected socket. This value may be overridden by *keep-alive* hints from the server. See [MDN: HTTP - Headers - Keep-Alive directives](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Keep-Alive#directives) for more details.
   - ***auth*** String - `username:password` used in HTTP Basic Authorization.
   - ***digestAuth*** String - `username:password` used in HTTP [Digest Authorization](https://en.wikipedia.org/wiki/Digest_access_authentication).
-  - ***followRedirect*** Boolean - follow HTTP 3xx responses as redirects. defaults to false.
+  - ***followRedirect*** Boolean - follow HTTP 3xx responses as redirects. defaults to true.
   - ***maxRedirects*** Number - The maximum number of redirects to follow, defaults to 10.
   - ***formatRedirectUrl*** Function - Format the redirect url by your self. Default is `url.resolve(from, to)`.
   - ***beforeRequest*** Function - Before request hook, you can change every thing here.