chore: require PHP 8.2 (#12)

Author: OskarStark

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=8.1",
+        "php": ">=8.2",
         "php-llm/llm-chain": "dev-main",
         "symfony/framework-bundle": "^6.4 || ^7.0",
         "symfony/config": "^6.4 || ^7.0",