docs: update readme for php8.2 requirement (#151)

Author: iBotPeaches

README.md

@@ -18,7 +18,7 @@
 
 ## Get Started
 
-> **Requires [PHP 8.1+](https://php.net/releases/)**
+> **Requires [PHP 8.2+](https://www.php.net/releases/)**
 
 First, install OpenAI via the [Composer](https://getcomposer.org/) package manager: