Update validate_config.yml

roles/custom/matrix-bot-chatgpt/tasks/validate_config.yml

@@ -6,5 +6,5 @@
       You need to define a required configuration setting (`{{ item.name }}`).
   when: "item.when | bool and vars[item.name] == ''"
   with_items:
-    - {'name': 'matrix_bot_chatgpt_openai_apikey', when: true}
+    - {'name': 'matrix_bot_chatgpt_openai_api_key', when: true}
     - {'name': 'matrix_bot_chatgpt_matrix_bot_username', when: true}