Update default OpenAI image generation model for baibot (gpt-image-1 -> gpt-image-1.5)

roles/custom/matrix-bot-baibot/defaults/main.yml

@@ -406,7 +406,7 @@ matrix_bot_baibot_config_agents_static_definitions_openai_config_text_to_speech_
 matrix_bot_baibot_config_agents_static_definitions_openai_config_text_to_speech_response_format: opus
 
 matrix_bot_baibot_config_agents_static_definitions_openai_config_image_generation_enabled: true
-matrix_bot_baibot_config_agents_static_definitions_openai_config_image_generation_model_id: gpt-image-1
+matrix_bot_baibot_config_agents_static_definitions_openai_config_image_generation_model_id: gpt-image-1.5
 matrix_bot_baibot_config_agents_static_definitions_openai_config_image_generation_style: null
 matrix_bot_baibot_config_agents_static_definitions_openai_config_image_generation_size: null
 matrix_bot_baibot_config_agents_static_definitions_openai_config_image_generation_quality: null