Fix SupportFileDownloads - Multibyte character support

[nxsdev]

1️⃣ Is this something that is wanted/needed? Did you create a discussion about it first?
Yes
#4946
This is not a discussion I created, but another person put it up.
2️⃣ Did you create a branch for your fix/feature? (Master branch PR's will be closed)
Yes
3️⃣ Does it contain multiple, unrelated changes? Please separate the PRs out.
No
4️⃣ Does it include tests? (Required)
Yes
5️⃣ Please include a thorough description (including small code snippets if possible) of the improvement and reasons why it's useful.

if (preg_match('/filename\*=utf-8\'\'(.+)$/i', $header, $matches)) {
    return rawurldecode($matches[1]);
}

I added the above code to livewire/src/Features/SupportFileDownloads.php above. Currently, there was a problem that file names containing Japanese characters would end up as ______.csv when trying to download them. We believe this needs to be fixed, especially since Livewire is a very popular library in Japan.
We have improved the problem by adding a decoding process in the case of filename*, and confirmed that it works with UnitTest.

I have tested this modification on Laravel in the following environment
PHP 8.2.9
Laravel 10.22.0

#4946
I tested with Ελληνικά.xlsx and Japanese ダウンロード.csv in the same situation as

Before the modification, as shown below, ________.xlsx and ______.csv with multibyte characters did not download with the correct file name.

With this correction, we can confirm that we were able to download the file with the correct file name.
Below is a screenshot of the corrected file.

[nxsdev]

It appears that you need to get approval from the maintainer. Can anyone help me get approval?

[calebporzio]

Thanks!