Replace unmaintained yosymfony/toml with php-collective/toml

README.md

 
 * [PHP Dotenv](https://github.com/vlucas/phpdotenv) - Parse and load environment variables from `.env` files.
 * [Symfony Dotenv](https://github.com/symfony/dotenv)- Parse and load environment variables from `.env` files.
-* [Yo! Symfony TOML](https://github.com/yosymfony/toml) - A PHP parser for [TOML](https://github.com/toml-lang/toml).
+* [TOML](https://github.com/php-collective/toml) - A TOML parser and encoder with AST access and error recovery.
 
 ### LLMs
 *Libraries for working with Large Language Models.*