Update php to 8.1.0

[shivammathur]

php formula has been upgraded to stable 8.1.0.

• Now you can install PHP 8.1 using

brew install shivammathur/php/php

or using the [email protected] Alias

brew install shivammathur/php/[email protected]

• To install [email protected], please use the [email protected] formula.

brew install shivammathur/php/[email protected]

Progress

• Update php.rb formulae to 8.1.0.
• Update php alias to [email protected].
• Remove [email protected] formula.
• Add PHP 8.0 back as [email protected] formula.
• Update docs.