Change default OpenAI model for baibot (`gpt-4.1` -> `gpt-5`)

Ref: https://openai.com/index/introducing-gpt-5/

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

@@ -368,16 +368,16 @@ matrix_bot_baibot_config_agents_static_definitions_openai_config_api_key: ""
 
 matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_enabled: true
 # For valid model choices, see: https://platform.openai.com/docs/models
-matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_model_id: gpt-4.1
+matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_model_id: gpt-5
 # The prompt text to use (can be null or empty to not use a prompt).
 # See: https://huggingface.co/docs/transformers/en/tasks/prompting
 matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_prompt: "{{ matrix_bot_baibot_config_agents_static_definitions_prompt }}"
 # The temperature parameter controls the randomness of the generated text.
 # See: https://blogs.novita.ai/what-are-large-language-model-settings-temperature-top-p-and-max-tokens/#what-is-llm-temperature
 matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_temperature: 1.0
-matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_max_response_tokens: 16384
-matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_max_completion_tokens: ~
-matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_max_context_tokens: 128000
+matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_max_response_tokens: ~
+matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_max_completion_tokens: 128000
+matrix_bot_baibot_config_agents_static_definitions_openai_config_text_generation_max_context_tokens: 400000
 
 matrix_bot_baibot_config_agents_static_definitions_openai_config_speech_to_text_enabled: true
 matrix_bot_baibot_config_agents_static_definitions_openai_config_speech_to_text_model_id: whisper-1