PHP8.1: Passing null to parameter #2 ($numeric_prefix) of type string is deprecated

[haozi]

In file wp-includes/Requests/Transport/cURL.php on line 345

 $data = http_build_query($data, null, '&'); 

we can fix it like:

<?php $data = http_build_query($data, '', '&'); 

[costdev]

Thanks for the report @haozi!

The update of the Requests library is already being tracked in #54504, so I'll close this issue as a duplicate.