Issue #3427583: Fix not found URL by adding the Complete Base Url for the link to `OpenAI settings configuration here` in the not provided an OpenAI API key yet error message

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src/EventSubscriber/OpenAIEventSubscriber.php

@@ -38,7 +38,7 @@ final class OpenAIEventSubscriber implements EventSubscriberInterface {
       $message = $this->t('You have not provided an OpenAI API key yet. This is required for its functionality to work. Please obtain an API key from <a href=":account">your OpenAI account</a> and add it to the <a href=":settings">OpenAI settings configuration here</a>.',
         [
           ':account' => 'https://platform.openai.com/',
-          ':settings' => '/admin/config/openai/settings'
+          ':settings' => $event->getRequest()->getSchemeAndHttpHost() . $event->getRequest()->getBaseUrl() . '/admin/config/openai/settings',
         ],
       );