[BrowserKit] Fixed regression with redirects and port number

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11621
| License       | MIT
| Doc PR        | -

`updateServerFromUri()` did not consider the PORT as part of the Host but
`request()` does this since
https://github.com/symfony/BrowserKit/commit/650db4cc53461846f919d49199e50b85b56360b3 .

Changed the method to use `extractHost()` to be consistent with other
behavior.

fixes #11621