V5.5.7 requirements?

OK, updated to PHP8.1 successfully I think.
php -v
PHP 8.1.8 (cli) (built: Jul 11 2022 08:29:57) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.8, Copyright (c) Zend Technologies
with Zend OPcache v8.1.8, Copyright (c), by Zend Technologies

However
systemctl status php8.1-fpm
● php8.1-fpm.service - The PHP 8.1 FastCGI Process Manager
Loaded: loaded (/lib/systemd/system/php8.1-fpm.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2022-08-06 20:10:49 UTC; 6s ago
Docs: man:php-fpm8.1(8)
Process: 62601 ExecStartPost=/usr/lib/php/php-fpm-socket-helper install /run/php/php-fpm.sock /etc/php/8.1/fpm/poo>
Main PID: 62586 (php-fpm8.1)
Status: “Ready to handle connections”
Tasks: 3 (limit: 5209)
Memory: 9.8M
CGroup: /system.slice/php8.1-fpm.service
├─62586 php-fpm: master process (/etc/php/8.1/fpm/php-fpm.conf)
├─62599 php-fpm: pool www
└─62600 php-fpm: pool www

Aug 06 20:10:49 charlie.myvnc.com systemd[1]: Starting The PHP 8.1 FastCGI Process Manager…
Aug 06 20:10:49 charlie.myvnc.com systemd[1]: Started The PHP 8.1 FastCGI Process Manager.

And now my website says
“Composer detected issues in your platform: Your Composer dependencies require a PHP version “>= 8.1.0”.”

So I ran composer update and it looks like everything went fine… But I still get “Composer detected issues in your platform: Your Composer dependencies require a PHP version “>= 8.1.0”.”

help?