change symphony/http-client requirement

Author: keiserjb

composer.json

@@ -12,13 +12,17 @@
         }
     ],
     "require": {
+        "php": ">=8.1",
         "openai-php/client": ">=v0.7.8",
         "guzzlehttp/guzzle": "^7.9",
         "guzzlehttp/psr7": "^2.7",
-        "symfony/http-client": "^7.1",
+        "symfony/http-client": "^6.4",
         "nyholm/psr7": "^1.8"
     },
     "config": {
+        "platform": {
+            "php": "8.1"
+        },
         "allow-plugins": {
             "php-http/discovery": true,
             "composer/installers": true