[BUGFIX] Require symfony/http-client directly in the guides

Otherwise it will be missing when installing the guides via composer

Author: linawolf

packages/guides/composer.json

@@ -30,6 +30,7 @@
         "psr/event-dispatcher": "^1.0",
         "symfony/string": "^5.4 || ^6.3",
         "symfony/translation-contracts": "^2.1 || ^3.0",
+        "symfony/http-client": "^5.4.25 || ^6.3",
         "twig/twig": "~2.15 || ^3.0",
         "webmozart/assert": "^1.11"
     },