testing/php82: upgrade to 8.2.0_rc6
will be announced on Nov 10
ref https://github.com/php/php-src/blob/4244258a62ba8a80a359f7bdf9f9ad2443eb020e/NEWS#L6-L31
part of #13798 (closed)
will be announced on Nov 10
ref https://github.com/php/php-src/blob/4244258a62ba8a80a359f7bdf9f9ad2443eb020e/NEWS#L6-L31
part of #13798 (closed)