Fix REDAME

Author: mrtolouei

README.md

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 [![Tests](https://github.com/mrtolouei/laravel-math-captcha/actions/workflows/tests.yml/badge.svg)](https://github.com/mrtolouei/laravel-math-captcha/actions/workflows/tests.yml)
 [![Latest Stable Version](https://poser.pugx.org/mrtolouei/laravel-math-captcha/v/stable)](https://packagist.org/packages/mrtolouei/laravel-math-captcha)
 
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 A **stateless, lightweight math-based CAPTCHA package for Laravel** that generates a simple arithmetic challenge as an image and verifies it via signed payloads.  
 No database, cache, or filesystem is required.
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 ## Features
 - Stateless: no DB, cache, or filesystem dependency.