[9.x] Fix php artisan serve with PHP_CLI_SERVER_WORKERS > 1

[christoph-kluge]

I checked it against php 8.0 and php 8.1 with laravel 9.32 and in both scenarios I receive an InvalidFormatException.

It turned out that (.*) seems to catch nested brackets. This PR restricts the allowed characters.

References #44204

 $line = '[13804] [Fri Nov 11 16:37:08 2022] [::1]:64202 Accepted'; 

- preg_match('/^\[\d+]\s\[(.*)]/', $line, $matches);
+ preg_match('/^\[\d+]\s\[([a-zA-Z0-9: ]+)]/', $line, $matches);

 var_dump($matches);

 array(2) {
   [0]=>
   string(40) "[13804] [Fri Nov 11 16:37:08 2022] [::1]"
   [1]=>
-  string(30) "Fri Nov 11 16:37:08 2022] [::1"
+  string(24) "Fri Nov 11 16:37:08 2022"
 }