update min support php 8.3 in gettins started

Author: Chemaclass

content/_index.md

@@ -68,7 +68,7 @@ docker run -it --rm phellang/repl
 
 ## Get Started with Phel in Minutes
 
-All you need is [PHP >=8.2](https://www.php.net/) and [Composer](https://getcomposer.org/).
+All you need is [PHP >=8.3](https://www.php.net/) and [Composer](https://getcomposer.org/).
 
 > Follow our [Getting Started Guide](/documentation/getting-started) to build and run your first Phel program today.
 

content/documentation/getting-started.md

@@ -5,7 +5,7 @@ weight = 1
 
 ## Requirements
 
-- PHP 8.2+
+- PHP 8.3+
 - [Composer](https://getcomposer.org/)
 
 ## Quick Start