[10.x] Fix the phpdoc for replaceMatches in Str and Stringable helpers

[joke2k]

This work aligns the type hinting of the $pattern parameter of the method replaceMatches in Str and Stringable classes, to match what the underneath php functions have:

// https://www.php.net/manual/en/function.preg-replace.php
preg_replace(
    string|array $pattern,
    string|array $replacement,
    string|array $subject,
    int $limit = -1,
    int &$count = null
): string|array|null

// https://www.php.net/manual/en/function.preg-replace-callback.php
preg_replace_callback(
    string|array $pattern,
    [callable](https://www.php.net/manual/en/language.types.callable.php) $callback,
    string|array $subject,
    int $limit = -1,
    int &$count = null,
    int $flags = 0
): string|array|null

[joke2k]

not sure what to do with the failing test in tests / PHP 8.3 - prefer-stable - Windows (pull_request)

Illuminate\Tests\Support\SleepTest::testItSleepsForSecondsWithMilliseconds

[driesvints]

@joke2k seems like a fluke. Restarted them for ya.